Conference Agenda
Please note small changes to the agenda are still possible.
Read about the Topical Meetings and sessions of the conference
Select a date or location to show sessions only on that day or location.
Select a single session for a detailed view (with abstracts and downloads when you are logged in as a registered attendee).
|
Session Overview |
Date: Tuesday, 12/Sept/2023 | |
8:30am - 10:00am | OPENING CEREMONY and PLENARY SPEECH by Thomas Ebbesen "Manipulating matter by strong coupling to the vacuum electromagnetic field" Location: Amphithéatre Romanéé Conti |
|
ID: 102
Plenary talk Manipulating matter by strong coupling to the vacuum electromagnetic field ISIS and Institute for Advanced Study University of Strasbourg, France Over the past decade, the possibility of manipulating material and chemical properties by using hybrid light-matter states has stimulated considerable interest [1,2]. Such hybrid light-matter states can be generated by strongly coupling the material to the spatially confined electromagnetic field of an optical resonator. Most importantly, this occurs even in the dark because the coupling involves the zero-point electromagnetic fluctuations of the resonator, the vacuum field. After introducing the fundamental concepts, examples of modified properties of strongly coupled systems, such as magnetism, charge and energy transport, and chemical reactivity will be given to illustrate the broad potential of light-matter states. |
10:00am - 10:30am | Coffee Break - Visit the Exhibition Location: Hall des grands Echézeaux |
10:30am - 12:00pm | IMOTS: Industrial mastering of optical technologies and systems, IMOTS S01 Location: Amphithéatre Romanéé Conti Session Chair: Oliver Faehnle, OST – Ostschweizer Fachhochschule, Switzerland Session Chair: Marco Hanft, Carl Zeiss AG, Germany |
|
Invited
ID: 555 / IMOTS: 1 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Meta optical elements product by nanoimprint lithography NIL Technology ApS, Denmark Meta optical elements product by nanoimprint lithography Invited
ID: 554 / IMOTS: 2 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Design and application of individualy shaped freeforms arrays ANAX, Japan Design and application of individualy shaped freeforms arrays Invited
ID: 547 / IMOTS: 3 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Making an entire optical parametric oscillators (OPO) smaller than a coin SLF Svenska Laserfabriken AB, Sweden Making an entire Optical Parametric Oscillators (OPO) smaller than a coin Invited
ID: 567 / IMOTS: 4 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Streamlined design of imaging systems under realistic conditions 1Fermat, Belgium; 2Brussels Photonics, Vrije Universiteit Brussel, Belgium; 3PanDao, Switzerland Fermat is a recently founded spin-off by the Brussels Photonics Team (B-PHOT) of the Vrije Universeit Brussel (VUB), Belgium. Based on our proprietary and disruptive ‘First Time Right’ methodology, we develop outstanding imaging optics solutions that are exactly tailored to our customers’ very individual needs. In this presentation, we will introduce the 'First Time Right' - based ecosystem. Our design methodology is derived from Fermat’s principle and allows calculating all optical surface coefficients that ensure minimal image blurring for each individual order of aberrations. We demonstrate the systematic, deterministic, scalable, and holistic character of our approach ranging from start lens generation to extreme catoptric and catadioptric freeform optical solutions. |
10:30am - 12:00pm | TOM9 S01: Applications of Optics and Photonics Location: Morey St Denis Session Chair: Olivier Musset, Université de Bourgogne, France |
|
10:30am - 11:00am
Invited ID: 281 / TOM9 S01: 1 TOM 9 Applications of Optics and Photonics LED-pumped luminescent concentrators 1Laboratoire Charles Fabry, Institut d'Optique, CNRS, Université Paris-Saclay, France; 2aboratoire pour l’UtiLaboratoire pour l'utilisation des Lasers Intenses (LULI), CNRS, Ecole Polytechnique, CEA, Luminescent concentrators are parallelepipeds of luminescent material polished on all sides. The light is confined inside the structure and reaches the edges of the parallelepiped with high power density. The use of LEDs as the pump source provides robustness and cost effectiveness for these new sources that combine power and brightness. The presentation will explain the basic principles of LED pumped luminescent concentrators and describe two types of applications : laser pumping and illumination for imaging. 11:00am - 11:15am
ID: 324 / TOM9 S01: 2 TOM 9 Applications of Optics and Photonics Acoustic emissions – live monitoring of signals from the polishing gap 1Deggendorf Institute of Technology, Germany; 2Eastern Switzerland University of Applied Sciences While acoustic emissions are a method for e. g. the monitoring of bridges or for the assessment of the integrity of tanks, we wanted to investigate them for a further field of application. We tested AEs for the monitoring and assessment of a high-quality finishing process for optical components, the polishing of lenses. This process is - even though - it is of incalculable importance for nearly every optical component still a process which is commonly considered as some kind of black magic. With our research, we want to deliver an insight in this process with interacting mechanical and chemical processes. We want to present a method for the in-situ evaluation of a polishing process. 11:15am - 11:30am
ID: 403 / TOM9 S01: 3 TOM 9 Applications of Optics and Photonics Detection and identification of microplastics directly in water by hyperspectral imaging 1Department of Physics and Mathematics, Center for Photonics Sciences, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland; 2SIB Labs, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; 3School of Computing, Institute of Photonics, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland; 4Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, 80101 Joensuu, Finland. We use hyperspectral imaging to identify the plastic types constituting mixtures of microplastics directly in water. For the current study we used known microplastics made by milling original pristine plastic sheets and mixed them in water. Using database information and spectral information measured on those pristine plastic we created a decision table enabling the identification. This technique is used under these conditions paving a way towards on-field and in-line measurements. 11:30am - 11:45am
ID: 272 / TOM9 S01: 4 TOM 9 Applications of Optics and Photonics Linewidth-narrowing and frequency noise reduction of Brillouin fiber laser cavity operating at 1-µm 1Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS, Université de Bourgogne (UB), Dijon, France, France; 2Institut Universitaire de France (IUF), 1 Rue Descartes, Paris, France We report on a stabilized single-frequency Brillouin fiber laser operating at 1.06 µm by means of a passive highly nonlinear fiber ring cavity combined with a phase-locking loop scheme. We show significant linewidth narrowing (below 1-kHz) as well as frequency noise reduction compared to that of the initial pump in our mode-hop free Brillouin fiber laser. 11:45am - 12:00pm
ID: 264 / TOM9 S01: 5 TOM 9 Applications of Optics and Photonics Holographic mixed reality ultra-high-definition traffic signs to increase safety and inclusivity in transportation 1University of Cambridge, United Kingdom; 2University of Oxford, United Kingdom Current 2D windshield head-up displays can lead to driver distractions due to a shift of gaze from the road towards a small area of the windshield. Customizable mixed reality real-time head-up displays can increase safety in transportation due to the holographic road obstacles being aligned with the road scene. Based on accelerated parallel processing algorithms, a 4K spatial light modulator, virtual Gabor lenses and a He-Ne laser, 3D holographic road signs appear within 1.15 seconds in the driver’s gaze on the road. |
10:30am - 12:00pm | TOM3 S01: Advances in imaging techniques Location: Givry/Savigny Session Chair: Gilles Tessier, Sorbonne Université - Institut de la Vision, France |
|
10:30am - 11:00am
Invited ID: 385 / TOM3 S01: 1 TOM 3 BioPhotonics Advances in color and multicontrast multiphoton imaging of scattering tissues Ecole Polytechnique - CNRS, France The study of brain tissue development requires imaging approaches that ideally provide micron resolution, millimeter imaging depth, and multi-contrast capability. We will discuss recent approaches for large-scale imaging of uncleared tissues, namely color serial two-photon imaging [1] and three-photon (3P) microscopy. We will also present a novel label-free modality that combines some of these concepts, based on third-order sum frequency generation (TSFG). TSFG microscopy provides label-free imaging of red blood cells while being compatible with deep tissue 3P imaging [2]. References: [1] Abdeladim et al, Nat Commun (2019), https://doi.org/10.1038/s41467-019-09552-9. [2] Ferrer Ortas et al, Light Sci App (2023), https://doi.org/10.1038/s41377-022-01064-4. 11:00am - 11:15am
ID: 498 / TOM3 S01: 2 TOM 3 BioPhotonics Pushing the performance of image scanning microscopy to its limits with maximum likelihood reconstruction 1Istituto Italiano di Tecnologia, Molecular Microscopy and Spectroscopy, Italy; 2Università degli studi di Genova, DIBRIS, Italy Fast and sensitive detector arrays make Image Scanning Microscopy (ISM) the natural successor of confocal microscopy. Indeed, ISM enables super-resolution at an excellent signal-to-noise ratio. Optimizing photon collection requires large detectors and so more out-of-focus light is collected. Nonetheless, the ISM dataset inherently contains information on the axial position of the fluorescence emitters. We exploit such information to directly invert the corresponding physical model with a maximum-likelihood approach and reassign the signal in the three dimensions, improving the signal-to-background ratio and resolution. We validated our method on synthetic and experimental images; these latter acquired with a custom setup equipped with a single photon avalanche diode array detector. Moreover, our method is compatible with recent developments in ISM data processing and requires minimal knowledge of physical parameters. 11:15am - 11:30am
ID: 143 / TOM3 S01: 3 TOM 3 BioPhotonics Fast, large-field fluorescence and second-harmonic generation imaging with a single-spinning disk two-photon microscope 1TILL ID, Gräfelfing, Germany; 2CNRS, Paris, France; 3IIBCE, Montevideo, Uruguay; 4BINA, BIU, Ramat-Gan, Israel Confocal microscopes have been the workhorses of 3-D biological imaging, but they are slow, offer limited depth penetration and collect only ballistic photons. With their inefficient use of excitation photons they expose biological samples to an often intolerably high light burden. The speed limitation and photo-bleaching risk can be somewhat relaxed in a spinning-disk geometry, due to shorter pixel dwell times and rapid re-scans during image capture. Alternatively, light-sheet microscopes rapidly image large volumes of transparent or chemically cleared samples. Finally, with infrared excitation and efficient scattered-light collection, 2-photon microscopy allows deep-tissue imaging, but it remains slow. Here, we describe a new optical scheme that borrows the best from three different worlds: the speed and direct-view from a spinning-disk confocal, deep tissue-penetration and intrinsic optical sectioning from 2-photon excitation, and a large field of view and a low invasiveness of a selective-plane illumination microscope – all with a single objective lens. We validate the performance of our 2-photon spinning-disk microscope in various applications that have in common to simultaneously require a large depth penetration, high speed and larger fields of view. Beyond biological fluorescence, we demonstrate an application in material science, imaging coherent non-linear scattering from a 3-D nano-porous network 11:30am - 11:45am
ID: 489 / TOM3 S01: 4 TOM 3 BioPhotonics Hyperspectral imaging of stone biofilms at the macroscopic scale 1Department of Physics, Politecnico di Milano, Italy; 2Department of Chemistry, Politecnico di Milano, Italy; 3Department of Food, Environmental and Nutritional Sciences, University of Milan, Via Mangiagalli 25, Milan, 20133, Italy; 4Department of Sciences of Antiquity, “La Sapienza” University of Rome, Piazzale Aldo Moro 5, Rome, 00185, Italy; 5CNR-IFN, Piazza Leonardo da Vinci 32, Milan, Italy The ability to observe traces of biological material on buildings and stone artworks is of particular importance in understanding how to best deal with them and maybe, in the future, even make use of biofilms for conservation science. We have identified hyperspectral imaging as a viable method for the efficient analysis of such biological materials. Thanks to the high throughput of our approach based on an interferometric method based on Fourier Transform, we were not only able to detect traces of biofilms on stone samples, but also to map in which areas these were found to have higher biological activity. 11:45am - 12:00pm
ID: 370 / TOM3 S01: 5 TOM 3 BioPhotonics Inspection of plant pathologies through pseudocolored images based on polarimetric basis 1Grup d’Óptica, Dept. de Física, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain; 2I.U. Física Aplicada a las Ciencias y las Tecnologías, U. de Alicante, 03080, Alicante, Spain; 3Institute of Agrifood Research and Technology (IRTA), Cabrils, 08348, Spain; 4Botanical Institute of Barcelona (IBB, CISC-ICUB), 08038, Barcelona, Spain The study of the interaction of biological tissue with polarized light leads to relevant information of physical properties (dichroism, retardance and depolarization) of samples. Polarimetric analysis of different characteristics in tissues is useful for applications such us tissue classification, contrast enhancement or pathology detection. By means of polarimetric imaging techniques we can characterize the polarimetric signature of biological samples in a noninvasive and nondestructive way. We have found that depolarization information is of special interest in turbid media such as plant tissue. In this manuscript we use polarimetric observables for plant inspection. In particular, we provide enhanced visualization of certain plant pathologies by constructing depolarization based pseudocolored images of pathological leaves where the pathological areas are revealed. |
10:30am - 12:00pm | TOM2 S01: Adaptive and Freeform Optics Location: Mercurey Session Chair: Alois Herkommer, University Stuttgart, Germany |
|
10:30am - 11:00am
Invited ID: 518 / TOM2 S01: 1 TOM 2 Adaptive and Freeform Optics Designing with freeform optics University of Rochester, United States of America Freeform Optics enables the design of more compact or more complex optical systems. Here, we will demystify designing with freeform surfaces, yet demonstrate their power in optical design. Designing for manufacture is important for affordability, and this is even more critical with freeform optics due to their complexity. We will seize the opportunity to also discuss the importance of concurrent engineering in designing freeform optical systems. Finally, we will briefly introduce a novel optical component, the metaform. 11:00am - 11:15am
ID: 145 / TOM2 S01: 2 TOM 2 Adaptive and Freeform Optics Adaptive illumination systems with programmable freeform optics ? KU Leuven, Belgium Adaptive illumination systems are capable of changing their emission pattern in a dynamic and flexible manner. Such systems can be realized with tunable optical components. We analyze the possibilities and limitations of phase-only spatial light modulators, implemented as a kind of programmable freeform optics, to realize adaptive illumination systems. First, the calculation of the required phase shift patterns to generate specific target irradiance distributions from arbitrary incident wavefronts, is elaborated. Second, the practical limitations of generating prescribed target patterns are experimentally tested and critically discussed. 11:15am - 11:30am
ID: 509 / TOM2 S01: 3 TOM 2 Adaptive and Freeform Optics Complex illumination system for fast interferometric measurements University Stuttgart, Institute of Applied Optics (ITO), Stuttgart, Germany Freeform metrology is an enabling technology for today’s research and advanced manufacturing. The Tilted Wave Interferometer is a full field measurement system for fast and flexible measurements. It is based on an off-axis illumination scheme based on a microlens array. In this contribution, we present a novel illumination system for the tilted wave interferometer, that allows to reduce the measurement time by a factor of four using parallelization based on wavelength multiplexing. Here we present a design solution that utilizes the flexibility of 3D-printing. The microlenses are realized as multi-order diffractive optical elements, providing a high efficiency compared to colorfilter based realizations. To boost the light efficiency of the novel illumination system further, a field lens functionality is added to the system by adding individual micro-prisms to each microlens. The system is manufactured by the use of grayscale two-photon polymerisation. 11:30am - 11:45am
ID: 305 / TOM2 S01: 4 TOM 2 Adaptive and Freeform Optics CIAO : an on-the-shelf adaptive optics system for astronomers Imagine Optic, France Since 1990, adaptive optics are used in astronomy to remove the effects of atmospheric turbulence, and then retrieve diffraction-limited images, even in bad seeing conditions. Thanks to its strong knowledge in Shack-Hartmann wavefront sensing and deformable mirror, Imagine Optic has developed a simple and affordable adaptive optics system for astronomers. We present the current prototype as well as first experimental results on both natural stars and extended sources, with the main goal of allowing an effective correction in all sky conditions regardless of the object. 11:45am - 12:00pm
ID: 209 / TOM2 S01: 5 TOM 2 Adaptive and Freeform Optics Modulating phase for adaptive optics and PSF shaping in bio-imaging: requirements and development of a new deformable mirror tailored to microscopy Imagine Optic, France Modern bio-imaging techniques such as light-sheet, multiphoton and PALM/STORM are now aiming to image more complex biological samples at larger depth and therefore face larger-amplitude and more complex aberrations. We provide an analysis of key requirements driving optimal implementation of adaptive optics (AO) in microscopy, with a focus on wavefront modulators. We show that some specifications of wavefront modulators such as linearity, hysteresis or actuators performance & layout can end up to better AO performance in microscopy systems, when specifically optimized for such use. We then provide design details and characterization results of a newly developed deformable mirror, and report on experimental images obtained from AO-enhanced microscopes based on the device, for several modalities such as light-sheet, multiphoton or super-resolution single molecule localization systems. Finally, we provide recommendations on how to define the right set of AO components, algorithms and overall method depending on modality, instrument and sample constraints. |
10:30am - 12:00pm | FS1 S01: Specialty Optical Fibers I Location: St Romain Session Chair: Frédéric Smektala, Université de Bourgogne, France |
|
10:30am - 11:00am
Invited ID: 307 / FS1 S01: 1 Focused Sessions 1: Specialty optical fibers Soft glass based specialty optical fibers and their applications Toyota Technological Insitute, Japan This paper describes a prospect for broadband mid-infrared (mid-IR) highly coherent supercontinuum generation. Tellurite and chalcogenide glass with high transparency up to the mid-IR range are used as fiber materials. We successfully develop all-solid hybrid microstructured optical fibers made of tellurite and chalcogenide glass to control chromatic dispersion and demonstrate that highly nonlinear soft glass microstructured optical fibers are promising media for broadband mid-IR highly coherent supercontinuum generation. 11:00am - 11:15am
ID: 510 / FS1 S01: 2 Focused Sessions 1: Specialty optical fibers NV nanodiamond doped fiber for magnetic field mapping 1Uniwersity of Warsaw, Poland; 2Jagiellonian University, Poland; 3Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Poland; 4Gdańsk University of Technology, Poland The advances in fluorescent diamond-based magnetic field sensors have led this technology into the field of fiber optics. Recently, devices employing diamond nanobeams or diamond chips embedded on an optical fiber tip enabled achieving fT-level sensitivities. Nevertheless, these demonstrations were still confined to operation over localized magnetic field sources. A new approach of volumetric incorporation of nanodiamonds into the optical fiber core enables optical fibers sensitive to magnetic field at any point along the fiber length. We show that information on the perturbed spin state of a diamond nitrogen-vacancy color center can be transmitted over a macroscopic length in an optical fiber, in presence of noise from large concentration of the color centers along the fiber. This is exploited in optical readout at the fiber output not only of the magnetic field value, but also spatially variable information on the field, which enables the localization of its source. 11:15am - 11:30am
ID: 507 / FS1 S01: 3 Focused Sessions 1: Specialty optical fibers Soft, stretchable optical fibers via thermal drawing École Polytechnique Fédérale de Lausanne (EPFL), Switzerland Optical fibers that can sustain large elastic deformations are promising building blocks in soft robotics, medical and wearable devices, and advanced textiles. Thus far, however, the fabrication methods developed for soft optical fibers have remained unmatured. Here, we present thermal drawing as a materials and processing platform to fabricate 10s of meters-long soft, multi-material optical fibers with intriguing architectures. It offers unprecedented opportunities to realize step-index soft optical fibers, as well as photonic crystal fibers for transmission, reflection, and sensing. 11:30am - 11:45am
ID: 260 / FS1 S01: 4 Focused Sessions 1: Specialty optical fibers Refractive index profiling of multimode specialty optical fibers by absorption contrast X-ray computed microtomography 1STAR Research Infrastructure, University of Calabria, Via Tito Flavio, 87036 Rende (CS), Italy; 2DIET, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy; 3Department of Physics, University of Calabria, Via P. Bucci, 87069 Rende, Italy; 4DIMES, University of Calabria, Via P. Bucci, 87069 Rende, Italy; 5XLIM, UMR CNRS 7252, University of Limoges, 123 Avenue A. Thomas, 87060 Limoges, France; 6Faculty of Physics, University of Warsaw, Pasteura 5, 02-093, Warsaw, Poland; 7Lukasiewicz Research Network - Institute of Microelectronics and Photonics, Al. Lotnikow 32/46, 02-668, Warsaw, Poland We report on successful refractive index profiling of commercially available step-index and in-house made graded-index multimode specialty optical fibers by means of X-ray computed microtomography. Our results demonstrate that the latter is an advantageous technique for characterizing large core optical fibers, which allows for retrieving information about the refractive index at optical frequencies by exploiting the absorption coefficient of X-rays. 11:45am - 12:00pm
ID: 246 / FS1 S01: 5 Focused Sessions 1: Specialty optical fibers 4D optical fibers thermally drawn from shape-memory polymers CNRS Laboratoire ICB, France Adaptative objects based on shape-memory materials are expected to significantly impact numerous technological sectors including optics and photonics. In this work, we demonstrate the manufacturing of shape-memory optical fibers from the thermal stretching of additively manufactured preforms. First, we show how standard commercially-available thermoplastics can be used to produce long continuously-structured microfilaments with shape-memory abilities. Shape recovery as well as programmability performances of such elongated objects are assessed. Next, we open the way for light-guiding multicomponent fiber architectures that are able to switch from temporary configurations back to user-defined programmed shapes. We strongly expect that such actuatable fibers with light-guiding abilities will trigger exciting progress of unprecedented smart devices in the areas of photonics, electronics, or robotics. |
10:30am - 12:00pm | TOM7 S01: Frequency comb spectroscopy Location: Santenay/Chablis Session Chair: Sandrine Galtier, Institut Lumière Matière, France |
|
10:30am - 11:00am
Invited ID: 323 / TOM7 S01: 1 TOM 7 Optical frequency combs Ramsey-comb XUV spectroscopy: on the road towards an accurate measurement of the 1S-2S transition in He+ LaserLaB, Vrije Universiteit Amsterdam, The Netherlands Precision spectroscopy of atomic hydrogen provides important tests of bound-state quantum electrodynamics (QED) and searches for new physics. As an independent approach to these tests heavier one-electron atoms can be investigates, as high-order QED terms scale with powers of Z. We aim to measure the 1S-2S transition in He+ with a combination of 790 nm and 32 nm photons using the Ramsey-comb spectroscopy method in combination with high-harmonic generation (HHG). As an important first step towards this goal, we present the first precision measurements using both these techniques on a transition in xenon at 110 nm. The relative accuracy of the measurement of 2.3x10-10 was not hampered by the HHG process and is the highest ever achieved with light generated through this process. A second important step was recently taken with the first observation of laser excitation of the 1S-2S transition in He+ using our unequal photon scheme. In this case, a single 150 fs pulse was sent through a neutral beam of He atoms to ionize them to He+, then excite the 1S-2S transition and ionize the excited ions further to He2+. This paves the way to a precision measurement in a single trapped He+ ion with Ramsey-comb spectroscopy. 11:00am - 11:15am
ID: 216 / TOM7 S01: 2 TOM 7 Optical frequency combs Broadband cavity ring-down Fourier-transform spectroscopy 1Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France; 2Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland We perform broadband cavity ring-down spectroscopy (CRDS) relying on the near-infrared frequency comb as the excitation source and a time-resolved mechanical Fourier transform spectrometer as detection device. The many decays corresponding to each spectral element are recorded simultaneously and sorted after Fourier transformation to yield the CRDS spectrum of CO in Ar contained in a 20’000-finesse cavity. 11:15am - 11:30am
ID: 328 / TOM7 S01: 3 TOM 7 Optical frequency combs Dual-comb spectrometer in the two-micron region using a new design of dispersion-controlled highly nonlinear fibre 1Laboratoire ICB, France; 2Laboratoire Temps-Fréquence, Institut de Physique, Université de Neuchâtel, Avenue de Bellevaux 51, 2000 Neuchâtel, Switzerland; 3Université de Limoges, CNRS, XLIM, UMR 7552, F-87000 Limoges, France; 4Univ. Côte d’Azur, CNRS, Institut de Physique de Nice, F-06108 Nice Cedex 2, France; 5CELIA, Centre Laser Intenses et Applications, Université de Bordeaux-CNRS-CEA, UMR 5107, F-33405 Talence Cedex France; 6Institut Universitaire de France (IUF), 1 rue Descartes, Paris, France We present here an experimental demonstration of dual-comb spectroscopy performed around 2 μm, with the use of a new design of dispersion-controlled highly nonlinear fibre. The latter allows us to efficiently convert light via a four-wave mixing process from 1.55 μm to 2 μm, which is a spectral region suited for the detection of pollutants such as CO2 or N2O. Experimental measurements have been performed with these two molecules and show an excellent agreement with the HITRAN database. |
10:30am - 12:00pm | TOM4 S01: Optical nanodevices&hybrid nano-optics Location: Musigny/Pommard/Volnay Session Chair: Alexandre Bouhelier, CNRS, France |
|
10:30am - 11:00am
Invited ID: 543 / TOM4 S01: 1 TOM 4 Nanophotonics Topological lasers and scale-invariant Berkeley Surface Emitting Lasers (BerkSELs): University of Berkeley, California, United States of America 11:00am - 11:15am
ID: 350 / TOM4 S01: 2 TOM 4 Nanophotonics Non-invasive fabrication of plasmonic nanostructures on dielectric substrates coated with transparent-conductive oxide 1OptMatLab, Dipartimento di Fisica, Università di Genova, Italy; 2LabNano, Dipartimento di Fisica, Università di Genova, Italy; 3Nanomed Labs, Dipartimento di Fisica, Università di Genova, Italy; 4CNR-SPIN, C.so Perrone 24, I-16152 Genova, Italy 11:15am - 11:30am
ID: 454 / TOM4 S01: 3 TOM 4 Nanophotonics Complete design of an efficient and fully integrated graphene-based compact plasmon coupler for the infrared 1Aix-Marseille Université, France; 2Institut Fresnel UMR CNRS 7249, France 11:30am - 11:45am
ID: 480 / TOM4 S01: 4 TOM 4 Nanophotonics Ultrafast hot carrier dynamics in ultrathin monocrystalline gold 1Laboratory of Nanoscience for Energy Technologies (LNET), STI, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland; 2Department of Physics and London Centre for Nanotechnology, King’s College London, London WC2R 2LS, U.K 11:45am - 12:00pm
ID: 265 / TOM4 S01: 5 TOM 4 Nanophotonics Direct observation of infrared electroluminescence of high mobility graphene field-effect transistors 1Institut Langevin, ESPCI Paris, Université PSL, CNRS, France; 2Laboratoire de physique de l’ENS, 24, rue Lhomond, 75005 Paris, France; 3DOTA, ONERA, 6, chemin de la Vauve aux Granges, 91123 Palaiseau, France |
10:30am - 12:00pm | TOM5 S01: Nanomaterials and applications Location: Meursault/ Nuit ST-G./Corton Session Chair: Azzedine Boudrioua, LPL, Université Sorbonne Paris Nord, France |
|
10:30am - 11:00am
Invited ID: 278 / TOM5 S01: 1 TOM 5 Optical Materials Asymmetric dual-grating-gate plasmonic THz detectors based on InGaAs-channel HEMT and graphene-channel FET Research Institute of Electrical Communication, Tohoku University, Japan Towards realization of beyond-5G large-capacity and ultrahigh-speed terahertz (THz) wireless communication systems, we have developed InGaAs-channel high-electron-mobility transistor (HEMT) and graphene-channel field-effect transistor (G-FET) plasmonic THz detectors, featured by original asymmetric dual-grating-gate (A-DGG) structures. The A-DGG fingers act as a broadband deep-subwavelength grating coupler that converts incoming THz waves into 2D plasmons in the channel, and their strong hydrodynamic nonlinearities as well as their fast response enable fast, highly sensitive THz detection at room temperature. In this talk, we review recent advances of the A-DGG plasmonic THz detectors and demonstrate that they are promising for use in beyond-5G wireless communication systems. First, we investigate a new way to read out the photovoltage from the gate electrode of an A-DGG InGaAs-channel HEMT that enables the enhancement of responsivity in proportion to the active area size as well as the impedance matching to 50-Ω interconnection systems. Second, we demonstrate that a new plasmonic THz detection mechanism called “3D rectification effect” in an A-DGG InGaAs-channel HEMT in the gate-readout configuration drastically enhances the responsivity. Third, we reveal that, in an A-DGG G-FET, both plasmonic and photothermoelectric effects coexist as THz detection mechanisms, resulting in the high responsivity and 10-ps-order fast response time. 11:00am - 11:15am
ID: 152 / TOM5 S01: 2 TOM 5 Optical Materials Controlling the strong light-matter coupling in metal-dielectric optical resonators using spin-crossover molecules 1CNRS - Laboratoire de Chimie de Coordination, France; 2CNRS - Laboratoire d’Analyse et d’Architecture des Systèmes, France We report the observation of (ultra)strong light-matter coupling, in the UV spectral region, between optical modes of a metal/dielectric bilayer nanocavity and the electronic excitations of spin-crossover (SCO) molecules. By thermally switching the SCO molecules between their low-spin and high-spin states, we demonstrate the possibility of fine-tuning the light-molecule hybridization strength, allowing a reversible switching between strong- (with Rabi splitting values of up to 550 meV) and weak-coupling regimes within a single photonic resonator. As a result, we show that spin-crossover molecular compounds constitute a novel, promising class of active nanomaterials in the context of tuneable and reconfigurable polaritonic devices. 11:15am - 11:30am
ID: 194 / TOM5 S01: 3 TOM 5 Optical Materials Strong Er^3+ radiative emission enhancement by quasi-BIC modes coupling in all-dielectric slot nanoantenna arrays 1Dept. of Physics and Astronomy, University of Padova, Italy; 2The Blackett Laboratory, Dept. of Physics, Imperial College London, UK We have designed and realized all-dielectric lossless nanoantennas, in which a thin SiO2 layer doped with erbium ions is placed inside slotted silicon nanopillars arranged in a square array. The modal analysis has evidenced that the slotted nanopillar array supports optical quasi-BIC resonances with ultra-high Q-factors (up to Q∼10^9), able to boost the electromagnetic local density of optical states in the optically active layer. Up to 3 orders of magnitude photoluminescence intensity increment and 2 orders of magnitude decay rate enhancement have been measured at room temperature when the Er^(3+) emission at about λ=1540 nm couples with the quasi-BIC resonances. Furthermore, by tailoring the nanopillar aspect ratio, the slot geometry has been exploited to obtain selective enhancements of the electric or magnetic dipole contribution to Er^(3+) radiative transitions in the NIR, keeping the emitter quantum efficiency almost unitary. Finally, by computing the angularly resolved electromagnetic field enhancement inside the nanoslot, the nanoantenna directivity has been designed, proving that strong beaming effects can be obtained. Our findings have a direct impact on the development of bright and efficient photon sources operating at telecom wavelength that are of primary importance for quantum nanophotonic applications. 11:30am - 11:45am
ID: 292 / TOM5 S01: 4 TOM 5 Optical Materials Fabrication of nanometre sized gratings via ion irradiation 1Institute of Applied Physics Friedrich Schiller University Jena; 2Fraunhofer Institute for Applied Optics and Precision Engineering The damage caused by irradiation of crystalline material with ions results in localized volume changes. Here, swelling is utilized to fabricate nanostructured gratings with heights below 10 nm for extreme ultraviolet radiation. Irradiations were performed through a structured layer of photoresist shadowing parts of the sample from a broad ion beam. This enabled much shorter fabrication times than comparable direct write processes with a focussed ion beam. The study presents results from first systematic investigations regarding the fabrication of nanostructured gratings by irradiation of silicon with a broad beam of helium ions with energies of 30 keV. A smaller, scanned beam is used for comparison. Fluence was varied from 0.4 to 7.5×1e16 ions/cm^2 . Fabricated structures were measured via atomic force microscopy. This yielded a controllable method to fabricate shallow gratings with heights in the range of 0 to 10 nm. 11:45am - 12:00pm
ID: 417 / TOM5 S01: 5 TOM 5 Optical Materials Optical control of hierarchical DNA-functionalized nanoparticle self-assembly on 2D surfaces ABDULLAH GÜL UNIVERSITY, Turkiye We investigated the effect of light on the DNA-driven self-assembly to form hierarchical patterns on two dimensional surfaces. We specifically focused on the self-assembly of DNA-functionalized quantum dots (QDs) onto DNA-functionalized glass substrate while illuminating the surface with a laser during coating process. The region illuminated with a green laser remained uncoated with red-emitting QDs while the not-illuminated region was successfully coated. Next, a red laser whose light cannot be absorbed by the red-emitting QDs did not avoid the DNA-driven self-assembly of the QDs onto glass substrate. Additionally, we demonstrated that silica nanoparticles that had been functionalized with DNA and are not able to absorb the light in the visible regime were again coated on the surface while being exposed to a green laser. These results prove that the absorption of the light is responsible for controlling the binding-unbinding process of QDs. Finally, we added DNA-functionalized green-emitting QDs onto the area that was not coated with red-emitting QDs under the green laser exposure. We observed successful coating of previously uncoated regions with the green QDs. This revealed the viability of our technique for building up hierarchical structures without using, sophisticated, or resource-intensive microfabrication methods. |
12:00pm - 1:30pm | LUNCH - Visit the Exhibition Location: Chambertin |
1:00pm - 1:30pm | TOM7 S01b: Frequency comb spectroscopy Location: Santenay/Chablis Session Chair: Sandrine Galtier, Institut Lumière Matière, France |
|
1:00pm - 1:30pm
Invited ID: 540 / TOM7 S01b: 1 TOM 7 Optical frequency combs Chip-scale Terahertz quantum cascade laser frequency combs: recent advanced and applications in near field-nanoscopy CNR Pisa, Italy Chip-scale Terahertz quantum cascade laser frequency combs: recent advanced and applications in near field-nanoscopy |
1:30pm - 3:00pm | IMOTS2: Industrial mastering of optical technologies and systems, IMOTS S02 Location: Amphithéatre Romanéé Conti Session Chair: Marco Hanft, Carl Zeiss AG, Germany Session Chair: Oliver Faehnle, OST – Ostschweizer Fachhochschule, Switzerland |
|
Invited
ID: 553 / IMOTS2: 1 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Interfacing FEM analyses with optical design and simulations Ansys, United States of America Interfacing FEM analyses with optical design and simulations Invited
ID: 548 / IMOTS2: 2 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Raman-on-a-chip technology InSpek SAS, France Raman-on-a-chip technology Invited
ID: 549 / IMOTS2: 3 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) Deformable phase plates for adaptive optics: A simple solution for correcting complex aberrations phaseform, Germany Deformable Phase Plates for Adaptive Optics: A Simple Solution for Correcting Complex Aberrations Invited
ID: 550 / IMOTS2: 4 Industrial Mastering of Optical Technologies and Systems (submissions by invitation only) FMCW LiDAR for Automotive and Industrial Applications Scantinel Photonics, Germany LIDAR |
1:30pm - 3:00pm | TOM9 S02: Applications of Optics and Photonics Location: Morey St Denis Session Chair: Manuel Filipe Costa, University of Minho, Portugal Session Chair: Claver Giovanni Silveira Pinheiro, University of Minho, Portugal |
|
1:30pm - 2:00pm
Invited ID: 481 / TOM9 S02: 1 TOM 9 Applications of Optics and Photonics Three-dimensional chiral metamaterials for biosensing cnr, Italy In this contribution we will discuss the experimental application of 3D chiral metamaterials as high sensitivity biosensors, exploiting circular dichroism in transmission. 3D metamaterials with chiral features can be realized by highly accurate and highly localized bottom-up nanofabrication approach. Large chiroptical effects can be engineered, originating from the single element optical resonances, but collective interactions in arrayed configurations can play a significant role, further enhancing these effects. Capability of biomarker detection in the femtomolar range is demonstrated even in complex biofluid matrix. 2:00pm - 2:15pm
ID: 341 / TOM9 S02: 2 TOM 9 Applications of Optics and Photonics Light-sheet Scheimpflug ranging system for unmanned aerial vehicle (UAV) based remote sensing Wageningen University & Research, Netherlands, The As part of EU H2020 I-Seed project, an active laser-induced fluorescence observation system for Unmanned Aerial Vehicle is envisioned to simultaneously measure, geo-locate and range the fluorescence-tagged sensors. In this work, we present lab-scale experimental results of a light-sheet Scheimpflug ranging system employing the excitation laser source of the fluorescence observation setup to compliment the ranging capability of the complete UAV payload. 2:15pm - 2:30pm
ID: 242 / TOM9 S02: 3 TOM 9 Applications of Optics and Photonics Study of the feasibility of decoupling temperature and strain from a $\phi$-PA-OFDR readout using neural networks ETSIAE-Universidad Politécnica de Madrid, Spain This work's objective is to study the feasibility of decoupling temperature and strain out of a $\phi$-PA-OFDR readouts. For this purpose, the readouts will be subjected to a study using several Machine Learning algorithms, among them, Neural Networks. The motivation which underlies this target is the current blockage in the widespread use of Fiber Optic Sensors in situations where both strain and temperature change (e.g. composite manufacturing and integration processes), due to the coupled dependence of currently developed sensing methods. Instead of using other types of sensors or even other interrogation methods, the objective of this work is to analyze the available information in order to develop a sensing method capable of providing information about strain and temperature simultaneously 2:30pm - 2:45pm
ID: 135 / TOM9 S02: 4 TOM 9 Applications of Optics and Photonics Exploration and modelling of atmospheric turbulences effects for downlink scenario of free space optics communications South East Technological University, Ireland Scintillation, beam wandering, and phase front distortion are the principal impacts of atmospheric turbulence on laser beam propagation. The aperture averaging concept might be used to minimize the effect for the first two, but the third, which is important for high-speed free-space communications, is significantly more challenging. More than ten years ago, the institute of communications and navigation (IKN) of the german aerospace centre (DLR) conducted optical downlink experiments with JAXA's OICETS/Kirari-Japan to study the optical LEO downlink channel and assess the viability of this transmission technology for upcoming applications. The present work will study and give a comparable insight into simulation and experimental results showing a significant relationship elevation dependency for parameters linked to index-of-refraction turbulence. 2:45pm - 3:00pm
ID: 149 / TOM9 S02: 5 TOM 9 Applications of Optics and Photonics Give your optical metrology a LIFT Imagine Optic, 18, rue Charles de Gaulle, 91400 Orsay, France Shack Hartmann (SH) Wavefront Sensing (WFS) brings many advantages that has made it a standard in optical metrology, but it has long been limited by its resolution compared to other solutions, such as interferometry. We will present a new approach to the linearized focal plane technique (LIFT), formerly developed by ONERA, which is based on the combination of standard SH technology with phase retrieval algorithms. Applied on all the spots of the SH wavefront sensor microlens array, it provides information on high spatial frequencies, allows to reconstruct more modes for each microlens and results in a 16-fold improvement (4x in each transverse direction) of the sensor spatial resolution! We will present how we have optimized and validated the LIFT technology for optical metrology. We will share some measurements performed on extremely complex wavefronts. Finally, we will propose an implementation for industrial applications such as manufacturing and will describe some use cases. Benefiting from the same advantages as SH WFS -such as robustness to vibrations and atmospheric turbulence, or the ability to easily work at any wavelength- the LIFT technology presents very promising perspectives for optical and freeform metrology and can advantageously replace, at lower cost and better usability, Fizeau interferometry. |
1:30pm - 3:00pm | TOM3 S02: Bioinspired optics and sensors Location: Givry/Savigny Session Chair: Petra Paiè, Politecnico di Milano, Italy |
|
1:30pm - 1:45pm
ID: 210 / TOM3 S02: 1 TOM 3 BioPhotonics Fast Adaptive Optics in optically sectioned fluorescence microscopes for functional neuroimaging 1Imagine Optic, Orsay, France; 2Institut des Sciences Moléculaires d'Orsay (ISMO), Orsay, France; 3Institut de Biologie de l'Ecole Normale Supérieure (ENS-IBENS), Paris, France We demonstrate how a novel approach for closed-loop Adaptive Optics (AO) specifically adapted to microscopy enables straightforward integration in Light-Sheet and Multiphoton microscopes, as well as fast aberration correction. We present corresponding experimental setups as well as first demonstrations of the benefits of the correction of sample-induced aberrations in zebrafish and mouse brain tissue, with the ultimate goal to enable high-speed, high-sensitivity functional imaging at large depths. 1:45pm - 2:00pm
ID: 327 / TOM3 S02: 2 TOM 3 BioPhotonics Femtosecond laser rapid prototyping and characterization of microfluidic device for particles sorting 1POLIBA, Italy; 2UNIBA, Bari; 3IFN CNR Bari; 4IFN CNR MILANO Rapid prototyping methods for the fabrication of polymeric labs-on-a-chip (LoC) are on the rise, as they allow high degrees of precision and flexibility. In this contest, the flexibility of ultrafast laser technology enables the rapid prototyping and high-precision micromachining of 3D LoC devices with complex microfluidic channel networks. In this paper, we describe the realization process of a microfluidic tool for fully inertial particles sorting. The microfluidic network was realized in polymethyl methacrylate (PMMA), exploiting femtosecond laser technology. The multilayer device was assembled through a facile and low-cost solvent-assisted method. In particular, we studied the particle focusing in curved inertial microfluidic channel with trapezoidal cross section. A particles focusing along the walls of the device, sensitive to particle size and flow rate, was observed based on the principle of Dean-coupled inertial migration in spiral microchannel 2:00pm - 2:15pm
ID: 156 / TOM3 S02: 3 TOM 3 BioPhotonics Photonic crystal surface mode imaging for multiplexed real-time detection of antibodies, oligonucleotides, and DNA repair proteins 1Laboratoire de Recherche en Nanosciences, LRN, Structure Fédérative de Recherche Cap Santé, UFR de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France; 2Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute, National Research Nuclear University MEPhI, 115522 Moscow, Russia; 3DNA Repair Groupe, CNRS UMR 6286, US2B, Nantes Université, 44000 Nantes, France Sensors based on photonic crystal (PC) surface mode imaging are promising tools for label-free drug screening and discovery, diagnostics, and analysis of ligand–receptor interactions. Imaging of PC surface modes has been demonstrated to allow simultaneous real-time detection of multiple events at the sensor surface. Here, we report the engineering of a lateral-flow microfluidic assay where PC surface mode imaging is used for multiplexed detection of biomolecular targets (antibodies, oligonucleotides, and a DNA repair protein), as well as kinetic data on their interactions obtained without additional labelling or signal amplification. Our data demonstrate the suitability of the biosensing platform designed for ultrasensitive, quick, and low-cost detection and monitoring of interactions between different biomolecules. 2:15pm - 2:30pm
ID: 381 / TOM3 S02: 4 TOM 3 BioPhotonics Quartz-Enhanced photoacoustic spectroscopy for One-Health University of Bari, Italy We report on the development of Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) technology to detect 8 different air pollutants, namely CH4, NO2, CO2, N2O, CO, NO, SO2 and NH3, with the same acoustic detection module and interchangeable laser sources, to prove the modularity of the technique as well as the adaptability to different lasers. For each gas species, the fine structure of the infrared absorption bands has been simulated by using HITRAN database. Each gas species was detected with an ultimate detection limit well below their typical natural abundance in air even with a signal integration time as low as 0.1 s. 2:30pm - 2:45pm
ID: 366 / TOM3 S02: 5 TOM 3 BioPhotonics Fabrication of Plano-convex Microlenses using Two-Photon Polymerization for Bioimaging with Non-Linear Excitation Microscopy 1Department of Physics, Politecnico di Milano, Milan, Italy; 2Department of Chemistry, Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano, Milan, Italy; 3Department of Physics, Università degli Studi di Milano-Bicocca, Milan, Italy; 4Institute for Photonics and Nanotechnologies (IFN), CNR, Milan, Italy A recent challenge in bioimaging is the observation and imaging of vital, thick, and complex tissues in real time and in non-invasive mode. In the last decade, non-linear excitation microscopy showed several advantages for in-vivo imaging compared to conventional confocal techniques. Nevertheless, deep tissue imaging remains challenging, especially for thick media, due to spherical aberrations induced on focused beams by the tissue. A low numerical aperture objective lens coupled to high dioptric power microlenses, implanted in the tissue, can be beneficial for the reduction of optical aberrations. In this context, we fabricated a system of plano-convex microlenses and microscaffolds on a single chip by means of two-photon polymerization), to be used for non-linear imaging of biological specimens. 2:45pm - 3:00pm
ID: 224 / TOM3 S02: 6 TOM 3 BioPhotonics Terahertz ATR sheds light on real-time exchange kinetics occurring through plasma membrane during photodynamic therapy 1Ecole polytechnique, France; 2IMRCP, Université de Toulouse; 3Centre de Microscopie Electronique Appliquée à la Biologie, Université de Toulouse THz ATR spectroscopy provides, in a single measurement, the relative number of defects per membrane surface created by oxidative stress generated during photodynamic therapy (PDT), offering early, sensitive real-time information. THz spectroscopy is therefore a complementary technique to established (biological) assays and can be applied to any topic requiring the real-time examination of short-term plasma membrane permeabilization. |
1:30pm - 3:00pm | TOM2 S02: Adaptive and Freeform Optics Location: Mercurey Session Chair: Wilbert IJzerman, Signify, Netherlands, The |
|
1:30pm - 2:00pm
Invited ID: 431 / TOM2 S02: 1 TOM 2 Adaptive and Freeform Optics High-speed nanoscale microscopy in three dimensions University of Glasgow, United Kingdom Conventional approaches to microscopy record essentially two-dimensional images with a trade between transverse resolution and depth of field. Advances in computational imaging, using engineered point-spread functions have enabled an increase in depth of field, but generally with poor image quality arising from axial variations in the point-spread function. We report how the axial variations in Airy beams can be exploited to enable diffraction-limited, aberration-free 3D microscopy in a single snapshot for imaging of both 3D surfaces and 3D volumes. Localisation microscopy of point emitters enables microscopy with nanoscale nanoscale resolution and when implemented with various exotic point-spread functions this can be extended to 3D imaging. We will show how 3D locational microscopy based on Airy beams can enable much higher emitter densities, which enables the essential high-speed 3D measurement required in applications ranging through fluid dynamics, cardio-vascular monitoring and single-molecule imaging. 2:00pm - 2:15pm
ID: 121 / TOM2 S02: 2 TOM 2 Adaptive and Freeform Optics Optical Design of a High Flux Setup in the Extreme Ultraviolet 1South East Technological University, Ireland; 2Institute für Laser Technology ILT Extreme ultraviolet (XUV) light applications are still a very promising field that was heavily enlivened by the definition of the new wavelength for semiconductor lithography within the XUV range. But the detection of XUV light is also important for the exploration in the field of space science (i.e., monitoring the formation and evolution of solar storms) and high-energy physics (i.e., dark matter detection). The advancement of this technology mainly depends on the performance optimization of XUV sources, optical systems and related photodetectors. In this work, the optical design of a high flux XUV setup was simulated and defined to optimise the beam path which is the backbone of the initial evaluation process for the characterisation of luminescent materials under XUV irradiation. Additionally, the paper focused on the conceptualisation and realisation of the experimental setup as well as the alignment of the optical components and the detector calibration. 2:15pm - 2:30pm
ID: 182 / TOM2 S02: 3 TOM 2 Adaptive and Freeform Optics Concatenated backward ray mapping on the compound parabolic concentrator 1Eindhoven University of Technology, Netherlands, The; 2Signify Research, Netherlands, The Concatenated backward ray mapping is an alternative for ray tracing in 2D. It is based on the phase space description of an optical system. Phase space is the set of position and direction coordinates of rays intersecting an optical line. The original algorithm is limited to optical systems consisting of only straight line segments; we extend it to accommodate curved segments. The algorithm is applied to the compound parabolic concentrator, a standard optical system that collects parallel light and reshapes it to a focused beam. We compare the accuracy and speed of the extended algorithm to the original algorithm and Monte Carlo ray tracing. The results show that the extended algorithm outperforms both methods. 2:30pm - 2:45pm
ID: 138 / TOM2 S02: 4 TOM 2 Adaptive and Freeform Optics Computing Three-dimensional freeform Reflectors with a Scattering Surface 1Department of Mathematics and Computer Science, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands; 2Signify Research, High Tech Campus 7, 5656 AE Eindhoven, The Netherlands We present a novel approach to computing reflectors with a scattering surface in illumination optics. A scattering model governed by a Fredholm integral equation is derived. Solving this integral relation yields a virtual specular target distribution, which we insert into a Monge-Ampère least-squares numerical solver to get a scattering reflector that yields the desired illumination. 2:45pm - 3:00pm
ID: 186 / TOM2 S02: 5 TOM 2 Adaptive and Freeform Optics Aberration compensation in two-dimensional reflective optical systems 1Eindhoven University of Technology, Netherlands, The; 2Signify Research, Netherlands, The We present a novel approach to minimize aberrations in imaging systems. The energy distributions at the source and target of an optical system play a crucial role in designing freeform surfaces through illumination optics methodologies. We quantify the on-axis and off-axis aberrations using a merit function that depends on the energy distributions. The minimization of the merit function yields optimal energy distributions, which subsequently enable us to design freeform reflector surfaces that cause the least aberrations. We validate our method by testing it for two configurations, a single-reflector system with a parallel source to a near-field target, and a double-reflector system with a parallel source to a point target. |
1:30pm - 3:00pm | FS2 S01: Structured Light I Location: St Romain Session Chair: Pierre Béjot, CNRS/Université de Bourgogne, France Session Chair: Ignacio Moreno, Universidad Miguel Hernandez, Spain |
|
1:30pm - 2:00pm
Invited ID: 525 / FS2 S01: 1 Focused Sessions 2: Structured light Four-dimensional manipulation of light by orbital angular momentum structuring Fondazione Istituto Italiano di Tecnologia, Milan, Italy Assisted by the ultimate light manipulation properties offered by flat optical devices, we developed different schemes to impart orbital angular momentum on several beams that originate wavepackets with controllable spatial and temporal distributions. 2:00pm - 2:15pm
ID: 159 / FS2 S01: 2 Focused Sessions 2: Structured light Making entanglement between photonic Orbital Angular Momenta by Spontaneous Four Wave Mixing in an atomic vapor LCPMR, CNRS, Sorbonne-Université, France Spontaneous Four Wave Mixing (SFWM) which generates photonic pairs is studied if it is addressed by optical vortices carrying an orbital angular momentum (OAM). We show that the output beams are OAM-correlated and that the entanglement depends on the 4-level scheme used to realize SFWM. 2:15pm - 2:30pm
ID: 284 / FS2 S01: 3 Focused Sessions 2: Structured light Using molecules as a quantum interface to store ultrashort optical vortices ICB, France We exploit gas-phase molecules as light-matter interface to store an orbital angular momentum (OAM) or a superposition of OAM states (OAM-based photonic qubits) carried by ultrashort laser pulses. The interplay between spin angular momentum and OAM is exploited to encode the amplitude and spatial phase information of light beams into rotational coherences of molecules. This last is restored on-demand over tens of picoseconds with a reading beam by taking advantage of field-free molecular alignment. The underlying mechanism at the origin of the storage can be interpreted by the spatial structuring of the molecular sample induced by the field. The excitation indeed produces an inhomogeneous spatial distribution of molecular alignment (amplitude & orientation) whose periodical revivals associated with the quantum beatings of the rotational wavepacket enables to restore the spatial beam structure on-demand. The strategy is successfully demonstrated in CO2 molecules at room temperature. Besides applicability as storage medium with THz bandwidth application, the use of molecules as light-matter interface opens new functionalities in terms of optical processing and versatile control of OAM fields. 2:30pm - 2:45pm
ID: 166 / FS2 S01: 4 Focused Sessions 2: Structured light Mapping partially polarized light to incoherent superpositions of vector beams and vortex beams with orbital angular momentum 1Instituto de Bioingeniería, Universidad Miguel Hernández de Elche, E-03202 Elche, Spain; 2Aix Marseille Université, CNRS, Centrale Marseille, Institut Fresnel, UMR 7249, 13397 Marseille Cedex 20, France; 3Departamento de Física Aplicada, Universidad de Salamanca, E-37008 Salamanca, Spain Fully polarized light, cylindrical vector beams, and beams with opposite orbital angular momentum (OAM) and their superpositions are respectively represented as points on the Poincaré sphere (PS), the higher-order Poincaré sphere (HOPS) and the OAM Poincaré sphere (OAMPS). Here, we study the mapping of inner points between these spheres, which we regard as incoherent superpositions of points on the surface of their respective sphere. We obtain points inside the HOPS and OAMPS by mapping incoherent superpositions of points on the PS, i.e., partially polarized states. To map points from the PS to the HOPS, we use a q-plate, while for mapping points from the HOPS to the OAMPS, we use a linear polarizer. Furthermore, we demonstrate a new polarization state generator (PSG) that generates efficiently partially polarized light. It uses a geometric phase (GP) blazed grating to split an unpolarized laser into two orthogonal polarization components. An intensity filter adjusts the relative intensity of the components, which are then recombined with another GP grating and directed to a waveplate, thus achieving every point inside the PS. The proposed PSG offers advantages over other methods in terms of energy efficiency, ease of alignment, and not requiring spatial or long-time integrations. 2:45pm - 3:00pm
ID: 464 / FS2 S01: 5 Focused Sessions 2: Structured light Parallel illumination for depletion microscopy through acousto-optic spatial light modulation Universitat de Barcelona, Spain Several types of super-resolution microscopy, such as Stimulated Emission Depletion (STED), Reversible Saturable Optical Fluorescence Transitions (RESOLFT) or Switching Laser Mode (SLAM) microscopies, employ Laguerre-Gaussian beams (also called vortex or doughnut beams) to obtain fluorescence information within a sub-wavelength region of the specimen under observation, thus breaking the diffraction limit and producing images of greatly improved quality. However, in general, these techniques operate on a point-by-point basis, so we need to raster scan the sample in order to build a full, meaningful image, which takes time. Parallelization of the illumination is the only way to make these microscopies more suitable for live cell imaging applications. Here, we demonstrate the parallel production of arbitrary arrays of Gaussian and Laguerre-Gaussian lasers foci suitable for super-resolution microscopy, together with the possibility to fast scan through the sample, by means of acousto-optic spatial light modulation, a technique that we have pioneered in the past in several other fields. |
1:30pm - 3:00pm | TOM7 S02: Microcombs I Location: Santenay/Chablis Session Chair: Erwan Lucas, Laboratoire ICB, France |
|
1:30pm - 2:00pm
Invited ID: 534 / TOM7 S02: 1 TOM 7 Optical frequency combs New opportunities for microcombs with lithium niobate, silicon carbide, and computational optimization Harvard University, United States of America In this presentation, we will discuss dissipative Kerr soliton generation on Lithium Niobate and Silicon Carbide microresonators. Additionally, I will introduce inverse-designed nonlinear Fabry-Perot resonators on Silicon Nitride and Silicon Carbide platforms for frequency comb generation 2:00pm - 2:15pm
ID: 439 / TOM7 S02: 2 TOM 7 Optical frequency combs All-optical stabilization of soliton microcomb via CW laser injection 1Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany; 2Physics Department, Universität Hamburg UHH, Luruper Chaussee 149, 22761 Hamburg, Germany Repetition-rate locking in soliton microcombs via the injection of a weak second continuous-wave laser in the spectral wing of the soliton is studied experimentally, resulting in all-optical control and reduction of phase noise through optical division. 2:15pm - 2:30pm
ID: 408 / TOM7 S02: 3 TOM 7 Optical frequency combs Single-mode operated multimode AlGaAs-on-insulator microring resonators for Kerr comb generation Technical University of Denmark, Denmark We present a tapered coupler design to achieve single-mode operation in multimode microring resonators and experimentally demonstrate Kerr comb generation in a high-Q, single-mode operated AlGaAs-on-insulator multimode microring resonator. 2:30pm - 2:45pm
ID: 445 / TOM7 S02: 4 TOM 7 Optical frequency combs Temporal cavity solitons shorther than the limit Imposed by the Raman self-frequency shift Université libre de Bruxelles, Belgium We report on the formation of temporal solitons in a Kerr fiber resonator that includes a phase modulator shorter than the fundamental limit imposed by the stimulated Raman scattering. 2:45pm - 3:00pm
ID: 205 / TOM7 S02: 5 TOM 7 Optical frequency combs Unexpected phase-locked Brillouin Kerr Frequency comb in fiber Fabry Perot resonators 11UniversitÅLe de Lille, CNRS, UMR 8523-PhLAM–Physique des Lasers Atomes et Molecules, F-59000 Lille, France; 2Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France; 3LAAS-CNRS, UniversitÅLe de Toulouse, CNRS, 7 avenue de Colonel Roche, 31031 Toulouse, France; 4Aston Institute of Photonic Technologies, Aston University, Birmingham, UK We report the observation of a stable and broadband optical frequency comb in a high-Q fiber Fabry Perot resonator. We evidence it arises from an unexpected mode-locking phenomena. |
1:30pm - 3:00pm | TOM4 S02: Nonlinear nanophotonics&Optical materials Location: Musigny/Pommard/Volnay Session Chair: Rachel Grange, ETH Zurich, Switzerland |
|
1:30pm - 2:00pm
Invited ID: 316 / TOM4 S02: 1 TOM 4 Nanophotonics Nonlinear nanophotonics on hybrid silicon-organic platform EPFL, Switzerland 2:00pm - 2:15pm
ID: 266 / TOM4 S02: 2 TOM 4 Nanophotonics 2D chalcogenide thin films for super-resolved laser structuring Aix Marseille Univ, CNRS, Centrale Marseille, Institut Fresnel, Marseille, France, France 2:15pm - 2:30pm
ID: 391 / TOM4 S02: 3 TOM 4 Nanophotonics Second harmonic generation from nano cavities milled in thin aluminum film Bar-Ilan university, Israel 2:30pm - 2:45pm
ID: 444 / TOM4 S02: 4 TOM 4 Nanophotonics Electro-optical modulator based on photonic crystals on innovative thin films LiNbO3 FEMTO-ST, France 2:45pm - 3:00pm
ID: 456 / TOM4 S02: 5 TOM 4 Nanophotonics Spin-to-orbital angular momentum transfer by second harmonic generation in thin dielectric films 1CNIT and Department of Information Engineering, Università di Brescia, Italy; 2Istituto Nazionale di Ottica, CNR; 3Laboratoire MPQ, Université Paris Cité & CNRS, France; 4Charles M. Bowden Research Center, US; 5Université Grenoble Alpes, CEA, IRIG-PHELIQS, Grenoble, France |
1:30pm - 3:00pm | TOM5 S02: Optical materials and devices Location: Meursault/ Nuit ST-G./Corton Session Chair: Tiziana Cesca, University of Padova, Italy |
|
1:30pm - 2:00pm
Invited ID: 226 / TOM5 S02: 1 TOM 5 Optical Materials Exploiting the natural instability in thin and flexible dielectric solid films for sensing and photonic applications 1LENS and Department of Physics and Astronomy, University of Florence, Italy; 2Department of Physics, Politecnico di Milano, Milano, Italy; 3Aix Marseille Univ, Université de Toulon, CNRS, IM2NP Marseille, France; 4Institute of Chemical Sciences and Technologies (SCITEC) – CNR, Milano, Italy; 5Institute of Photonics and Nanotechnology (IFN) – CNR, Trento, Italy; 6Indivenire srl, Trento, Italy; 7Institute of Photonic and Nanotechnology (IFN)- CNR, LNESS laboratory, Como, Italy; 8Solnil, 95 Rue de la République, Marseille, 13002, France; 9Department of Information Engineering, University of Brescia, Brescia, Italy Flexible and stretchable photonics are emerging fields aiming to develop novel applications where the devices need to conform to uneven surfaces or whenever lightness and reduced thickness are major requirements. However, owing to the relatively small refractive index of transparent soft matter, these materials are not well adapted for light management at visible and near-infrared frequencies. Here we demonstrate simple, low cost and efficient protocols for fabricating Si1−xGex-based, sub-micrometric dielectric antennas with ensuing hybrid integration into different plastic supports. The dielectric antennas are realized exploiting the natural instability of thin solid films to form regular patterns of monocrystalline atomically smooth silicon and germanium nanostructures. Efficient protocols for encapsulating them into flexible and transparent, organic supports are investigated and validated. We benchmark the optical quality of the antennas with light scattering measurements, demonstrating the control of the islands structural colour and the onset of sharp Mie modes after encapsulation. 2:00pm - 2:15pm
ID: 315 / TOM5 S02: 2 TOM 5 Optical Materials Fabrication and assessment of mechanically flexible 1D photonic crystals 1IFN-CNR, CSMFO Lab. and FBK Photonics Unit, Via alla Cascata 56/C, 38123 Povo (TN), Italy; 2Dept. of Physics, Politecnico di Milano, P.zza L. da Vinci 32, 20133 Milan, Italy; 3Dept. of Materials Technology, Faculty of Applied Sciences, Ho Chi Minh City University of Technology and Education, Vo Van Ngan Str. 1, Thu Duc District, 720214 Ho Chi Minh City, Vietnam; 4Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo (TN), Italy; 5Dept. of Mechanics, Materials and Biomedical Engineering, Wroclaw University of Science and Technology, Smoluchowskiego 25, Wroclaw, 50-370, Poland; 6Biological Imaging and TranslaTUM, Technische Universität München, Ismaninger Str. 22, Munich, D-81675, Germany; 7Dept. of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, Trento, 38123, Italy; 8Institute of Low Temperature and Structure Research, PAS, ul. Okólna 2, Wroclaw, 50422, Poland; 9National Research Council (CNR), Institute of Applied Physics (IFAC) “Nello Carrara”, Via Madonna del Piano 10, Florence, Sesto Fiorentino, 50019, Italy; 10Department of Chemistry, NIS Interdepartmental Centre and INSTM Reference Centre, University of Turin, Via Pietro Giuria 7, Turin, 10125, Italy; 11Laboratorio Idrogeno Energia Ambiente (IdEA), Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo (TN), Italy; 12IFN-CNR, P.zza Leonardo da Vinci 32, Milan, 20133, Italy Flexible glass photonics is a cutting-edge technological and scientific research field that, thanks to a very broad spectrum of applications, has tremendously grown during the last decade and is now a strategic topic. Here, we present the results of the spectral transmittance and reflectance of a 10-layer SiO2/TiO2 1D photonic crystal deposited on a flexible polymeric substrate under different bending conditions, obtained with a home-made adjustable sample holder. 2:15pm - 2:30pm
ID: 367 / TOM5 S02: 3 TOM 5 Optical Materials Design and fabrication of a vanadium dioxide-based actively switchable wire grid polarizer for near-infrared applications 1Friedrich Schiller University Jena, Germany; 2Fraunhofer Institute for Applied Optics and Precision Engineering IOF; 3Munich University of Applied Sciences This study introduces an actively switchable wire grid polarizer exploiting the semiconductor-metal transition of vanadium dioxide. Operating at a near-infrared wavelength, the device features a SiO2 substrate with VO2 deposited by atomic layer deposition. We demonstrate the design using rigorous coupled wave analysis and show a viable fabrication route. Polarisation-resolved spectral transmission measurements show switching of the extinction ratio from 37.5 (on-state) to 1.6 (off-state). Despite observed deviations between measured and theoretical transmission values, the device shows potential in miniaturized imaging processes, polarization measurements, and ellipsometry. 2:30pm - 2:45pm
ID: 455 / TOM5 S02: 4 TOM 5 Optical Materials Micro-porous aluminum nitride wick for non-photo-thermal desalination UCRIVERSIDE, United States of America Aluminum nitride is a white, hydrophilic, high-band-gap ceramic. Here we report on the light-induced evaporation of saltwater through a capillary wick composed of drop-cast microparticles. Saltwater evaporation rates are significantly higher than expected. Our results point to significant potential for this interface-driven approach in solar non-thermal desalination and water separation technologies. 2:45pm - 3:00pm
ID: 446 / TOM5 S02: 5 TOM 5 Optical Materials Exciton fine structure of a single highly anisotropic CsPbBr3 nanocrystal 1Institut des NanoSciences de Paris, CNRS UMR 7588, Sorbonne Université, F-75005 Paris, France; 22LR01ES15 Laboratoire de Physique des Matériaux: Structure et Propriétés, Faculté des Sciences de Bizerte, Université de Carthage, Bizerte 7021, Tunisia We measured the photoluminescence (PL) of single CsPbBr3 nanocrystals (NCs) that have a highly anisotropic shape and orthorhombic crystal phase. As the thickness of these NCs is much more smaller than the other two dimensions, they are also called nanoplatelets (NPLs). We obtain PL spectra characterized by doublets separated in energy by about 2 meV in average and showing orthogonal and linearly polarized polar lines. We identified these doublets as the two bright-exciton states of the exciton fine structure contained in the plane of the NPLs. By a comparison between theory and experiments, we were able to obtain fundamental parameters as tetragonal and orthorhombic crystal field. We measured and analysed the time-resolved PL evolution as a function of temperature of small ensemble of NPLs. We thus succeed at framing the experimental value of the bright-dark exciton splitting (5-7meV) that is slightly smaller than the theoretical value. |
3:00pm - 3:30pm | Coffee Break - Visit the Exhibition Location: Hall des grands Echézeaux |
3:30pm - 5:00pm | TOM9 S03: Applications of Optics and Photonics Location: Morey St Denis Session Chair: Susana Silva, INESC TEC, Portugal |
|
3:30pm - 4:00pm
Invited ID: 298 / TOM9 S03: 1 TOM 9 Applications of Optics and Photonics How to usefiber optic sensors for accurate absolute measurements Physics, Portugal The scientific community has been exploring new concepts as a result of the usage of optical fibers as absolute measurement sensors. While cross-sensitivity is a common issue with optical fiber sensors, this issue has been mitigated by simultaneous measurement techniques. But when it comes to absolute measurements, these methods have some limitations. The white light interferometer, which offers a superb solution for a range of applications, especially for absolute temperature measurement, is one of the most often used methods for absolute measurements. 4:00pm - 4:15pm
ID: 208 / TOM9 S03: 2 TOM 9 Applications of Optics and Photonics Noninvasive glucose fiber sensor based on self-Imaging technique: Proof of concept 1INESCTEC, Institute for Systems and Computer Engineering, Technology and Science, Porto, Portugal; 2Department of Physics and Astronomy, Faculty of Sciences of University of Porto, Porto, Portugal This paper proposes a proof of concept for a reflective fiber optic sensor based on multimode interference, designed to measure glucose concentrations in aqueous solutions that mimic the range of glucose concentrations found in human saliva. The sensor is fabricated by splicing a short section of coreless silica fiber into a standard single-mode fiber. By studying the principles of multimode interference and Self-imaging it was developed a sensing head that has a total length of 29.1 mm, approximately equal to the second self-image cycle. This sensing head allowed us to detect low concentrations of glucose (ranging from 0 to 268 mg/dl). 4:15pm - 4:30pm
ID: 196 / TOM9 S03: 3 TOM 9 Applications of Optics and Photonics Analysis of forward Brillouin scattering in optical fibers with whispering-gallery modes 1Laboratory of Fiber Optics, ICMUV, Universidad de Valencia, Dr. Moliner 50, 46100, Burjassot, Spain; 2Departamento de Física Aplicada y Electromagnetismo, Universidad de Valencia, Dr. Moliner 50, 46100, Burjassot, Spain A new approach to detect and analyze transverse acoustic mode resonances (TAMRs), responsible for forward Brillouin scattering in optical fibers, is reported using optical whispering gallery modes (WGMs). TAMRs generate perturbations in the geometry and the dielectric permittivity of the fiber that couples the acoustic and optical resonances. This interaction is exploited to probe opto-excited TAMRs exhibiting an optimal efficiency for detecting low-order TAMRs. 4:30pm - 4:45pm
ID: 475 / TOM9 S03: 4 TOM 9 Applications of Optics and Photonics Bias-free multiparametric luminescence sensing by a single upconverting particle 1Nanomaterials for bioimaging Group, Universidad Autónoma de Madrid, Spain; 2Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Spain Upconverting particles (UCPs) are building blocks of modern photonics. They cannot be used only as imaging agents but also as contactless sensing units. UCPs have already been used for sensing forces, temperature, mechanical properties, and chemical composition. The sensitivity of the luminescence of UCPs to different external stimulus opens the possibility of using them as multiparametric sensors capable of one-shot description of medium possibilities. However, the use of UCPs for multiparametric sensing is limited because of bias: different external stimuli have an identical impact on the luminescence of UCPs. Bias makes impossible the reliable interpretation of the luminescence generated by UCPs and produces erroneous readouts. Avoiding bias requires the development of new strategies in the analysis of UCPs luminescence when used as sensors. In this work, we demonstrate how a single β-NaYF4: Yb3+, Er3+ UCP within an optical trap can provide unbiased measurements of temperature and viscosity. Decoupling thermal and mechanical measurements is achieved by using the luminescence of coupled states for thermal sensing and the polarization of luminescence for the determination of viscosity. The simultaneous and unbiased temperature/viscosity sensing from a single UCP is demonstrated in a series of proof-of-concept experiments 4:45pm - 5:00pm
ID: 544 / TOM9 S03: 5 TOM 9 Applications of Optics and Photonics Modeling the optical coherence of white LED University of Eastern FInland, Finland Applying the inverse-source technique, we have developed an analytical model describing the angular radiation and source-plane spatial-spectral coherence property of white light emitting diodes (LEDs) and demonstrated it experimentally. A corresponding elementary-field representation, which benefits by simplifying the treatment of partially coherent beam shaping and imaging problems, is formulated. Moreover, we identify spectral parts of white LED’s spectrum that follow Wolf’s scaling law of spectral invariance. |
3:30pm - 5:00pm | TOM6 S01: Nonlinear fiber lasers Location: Givry/Savigny Session Chair: Stefan Wabnitz, Sapienza University of Rome, Italy |
|
3:30pm - 4:00pm
Invited ID: 505 / TOM6 S01: 1 TOM 6 Nonlinear and Quantum Optics Machine learning control of complex nonlinear dynamics in fibre lasers 1Aston Institute of Photonic Technologies, University, United Kingdom; 2State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China; 3Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne, Dijon, France We review our recent work on the use of genetic algorithms to control non-stationary nonlinear wave dynamics in ultrafast fibre lasers, including the generation of breathing-soliton dynamics with controlled characteristics, the disclosure of the fractal dynamics of breathers, and the generation of rogue waves with controlled intensity. 4:00pm - 4:15pm
ID: 354 / TOM6 S01: 2 TOM 6 Nonlinear and Quantum Optics Microjoule-level normal dispersion fiber optical parametric chirped-pulse oscillator based on a collapsed-ends photonic crystal fiber 1CORIA UMR6614, CNRS & Université de Rouen Normandie, Rouen, France; 2Photonics Bretagne, Lannion, France We demonstrate for the first time the generation of broadband tunable and synchronized pulses exceeding the microjoule level using the new concept of fiber optical parametric chirped-pulse oscillation (FOPCPO). The oscillator is based on a collapsed-ends photonic crystal fiber pumped in the normal dispersion regime by a fiber laser. 4:15pm - 4:30pm
ID: 374 / TOM6 S01: 3 TOM 6 Nonlinear and Quantum Optics Effective strategy for accessing the multi-pulse regime of mode-locked fiber lasers 1Université de Bourgogne, CNRS UMR 6003, F-21078, Dijon, France; 2Institut Universitaire de France (IUF) We unveil a strategy for configuring mode-locked fiber lasers by means of a tunable bandpass filter, which allows multi-pulse structures to be generated without distortions in their intensity profiles, with significantly reduced pumping power levels. 4:30pm - 4:45pm
ID: 519 / TOM6 S01: 4 TOM 6 Nonlinear and Quantum Optics An overview of dissipative soliton resonance in fiber lasers Université d'Angers, France Because of the pulse energy quantization in fiber lasers, it is of great importance to find effective ways to increase the pulse energy directly from a fiber laser. An efficient technique is based on the dissipative soliton resonance (DSR) effect. The DSR manifest as a square pulse with constant peak power and a linear increase of both the pulse energy and duration for increasing pumping power. In practice, DSR is favoured with the use of long cavities. In this communication we propose an overview of DSR in fiber lasers including general theoretical approaches together with the most recent relevant experimental results 4:45pm - 5:00pm
ID: 450 / TOM6 S01: 5 TOM 6 Nonlinear and Quantum Optics "Talking" Vector Solitons and their Polarization Conformity in Fabry-Pérot Cavities 1Max Planck Institute for the Science of Light, Staudtstr. 2, 91058 Erlangen, Germany; 2SUPA & CNQO, Department of Physics, University of Strathclyde, 107 Rottenrow, Glasgow, G4 0NG, UK; 3Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany Optical frequency combs are applicable across many fields, especially in metrology. Through accounting for field polarization, the spontaneous symmetry breaking of vector temporal cavity solitons and combs in Kerr Fabry–Perot resonators is presented. This work can improve the generation of frequency combs through its control on the maximum number of soliton-pairs in a round trip and reveals the interesting phenomenon of dominant polarization conformity across all soliton-pairs in the cavity. |
3:30pm - 5:00pm | EU S01: EU Project Session Location: Mercurey Session Chair: Richard Charles Alexander Pitwon, Resolute Photonics, Ireland |
|
3:30pm - 3:40pm
Invited ID: 558 / EU S01: 1 EU Project Session Introduction on Photonics21 Resolute Photonics, Ireland - 3:40pm - 4:00pm
Invited ID: 565 / EU S01: 2 EU Project Session Advanced technologies for scanning and detection of illicit material for postal services and express courier flows (iFLOWS) ETH Zürich, Switzerland Project iFLOWS aims to develop a novel framework for the effective and uninterrupted screening of postal/courier flows involving all actors across the transport chain. The main concept of iFLOWS is based on a multi-tiered approach to screening of letters and parcels, enhancing cross-organisation collaboration and intelligence and upgrading the threat, illicit material and dangerous substances detection process. 4:00pm - 4:20pm
Invited ID: 433 / EU S01: 3 EU Project Session Integrated photonic-nano technologies for bioapplications 1Nottingham Trent University, United Kingdom; 2Universidad de Valencia, Spain; 3Aalto University, Finland Our project IPN-Bio aims to foster and develop long-term international, interdisciplinary, and inter-sectoral collaboration between Europe, USA, Latin America, and China. IPN-Bio consortium consists of 13 world-leading organizations (4 EU/UK universities, 3 EU/UK companies, and 6 third country partner organizations) from four continents and eight countries working at the frontier of the field with the complementary expertise in the multidiscipline of Photonics, Nanotechnology and Biotechnology. 4:20pm - 4:40pm
Invited ID: 504 / EU S01: 4 EU Project Session Dynamo: dynamic spatio-temporal modulation of light by phononic architectures Universitat Jaume I, Spain Transforming imaging with simultaneous light modulation Many products and devices depend on imaging technology, from projection displays to remote sensors. The EU-funded DYNAMO project hopes to achieve a new paradigm in imaging techniques by creating spatial light modulators which can operate simultaneously. Conventional spatial light modulators operate sequentially: a beam of light is shaped into different patterns, and the time interval between patterns is governed by the refresh rate of the device. Instead, researchers propose sending all patterns in one short nanosecond pulse, creating a dynamic spatiotemporal light modulation device. This will result in ultra-fast imaging with a refresh rate for dynamic pixels equivalent to that of the GHz range. Objective Imaging technologies form the basis of a vast range of products and devices and improvements would have a huge impact both scientifically and commercially. We have identified a key bottleneck, how light is modulated in the imaging system, that we can unlock to achieve a new paradigm in imaging technologies. Spatial light modulators, and similar components, operate sequentially: the light beam is shaped in different patterns but the time interval between patterns is limited by the refresh rate of the device. We will remove this limitation, thereby creating a technological breakthrough; our advance will be to send all possible patterns of the device simultaneously, and encoded in a short nanosecond pulse, creating the concept of parallel beam shaping or dynamic spatio-temporal light modulation device. In DYNAMO, we will shape optical beams in two spatial dimensions plus the temporal one. The equivalent refresh rate of the dynamic pixel will start at GHz, although we are confident it will become much higher by the end of the project. To give an idea of our ambition, we compare this improvement in the time to process images with the improvement in the clock frequency of computers: the first general-purpose electronic computer, the ENIAC, had a clock frequency of 100kHz in 1945. It was not until 2000 where AMD reached 1 GHz in their computers. Processing images is broadly similar to processing data so this is indicative of the fifty-year acceleration in the realm of imaging that we will achieve. DYNAMO is an ambitious and integrated project that begins by studying the fundamentals of acoustic wave scattering and ends by developing ultra-fast imaging applications in optics. The success of this pathway requires the synergy of the disciplines of physical acoustics, photonics and imaging. The outcomes from this project offer to accelerate imaging technologies and place European science and industry at the forefront of the inventions and advances that will follow. 4:40pm - 5:00pm
Invited ID: 551 / EU S01: 5 EU Project Session Laser vortex beams with extreme orbital angular momentum for aneutronic Fusion (V4F) 1Tampere University, Finland; 2Tampere Institute for Advanced Study, Tampere University, Finland V4F aims to show proof-of-principle of a new technology capable of unprecedented control over interactions with specially synthesised targets to significantly improve the energy balance of aneutronic fusion reactions. New concepts and advanced simulations of inertial confinement of aneutronic fusion reactions and particle acceleration will inform pioneering experiments in high-energy matter-interactions. Results could offer the prospect of breakthrough increases in alpha-particle yields from fusion reactions and mitigate the instabilities found in conventional fusion reactions. This work offers the tantalising possibility of aneutronic fusion as a waste-free nuclear energy source and radical new configurations of particle accelerators, leading to an efficient positron beam acceleration. The results will benefit society with game-changing new approaches to clean, safe energy production and significant downscaling of positron accelerators with dramatic impacts in medicine, industry and fundamental science. |
3:30pm - 5:00pm | FS3&2 S01: Chiroptical phenomena and Structured Light Location: St Romain Session Chair: Alessandro Belardini, Sapienza Università di Roma, Italy |
|
3:30pm - 4:00pm
Invited ID: 422 / FS3&2 S01: 1 Focused Sessions 3: Chiroptical phenomena Extrinsic chirality in metasurfaces: traditional and unconventional experiments Sapienza University of Rome, Italy Plasmonic nanostructures with achiral, but asymmetric shapes can exhibit chiro-optical phenomena at the nanoscale, given that the nanostructure-light interaction symmetry is broken. Such behaviour is defined as extrinsic chirality, and it is induced by properly arranging the experimental set-up. We show measurement techniques for extrinsic chirality in low-cost, asymmetric samples with nanostructures organized in metasurfaces. We employ widely tuneable chiro-optical characterization of transmission and reflection, as well as the circular polarization degree of the transmitted signal; near-infrared range (680-1080nm) and oblique incidence allow for the detection of resonant features in extrinsic chirality. Other, unconventional experiments use photo-thermal consequences of chirality governed absorption in metasurfaces. Photo-acoustic spectroscopy directly gives circular dichroism as a differential absorption of the left and right circular polarizations exciting the sample. Photo-deflection spectroscopy gives additional information of diffraction phenomena governed by the extrinsic chirality. We showed that these techniques can monitor the extrinsic chiral behaviour of the hybrid plasmonic metamaterials. Moreover, they can be used in combination with fluorescence-detected circular dichroism to measure the emission properties of fluorescent materials. 4:00pm - 4:15pm
ID: 270 / FS3&2 S01: 2 Focused Sessions 3: Chiroptical phenomena Development of low-cost, compact chiroptical imaging systems 1Department of Physics, Imperial College London, South Kensington Campus, Prince Consort Road, London SW7 2AZ, UK.; 2Centre for Processable Electronics, Imperial College London, South Kensington Campus, London SW7 2AZ, UK.; 3Department of Materials, Exhibition Road, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK.; 4Department of Chemistry and Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London, W12 0BZ, UK.; 5B23 Beamline, Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK Circular dichroism spectroscopy is a key probe of the structural and optical properties of chiral materials, however, commercial circular dichroism spectrometers are large, prohibitively expensive and rarely offer environmental control of the sample under test. Here we demonstrate two low-cost (<£2,000) and portable imaging systems controlled by our own bespoke open-source control software which are capable of spatially mapping the circular dichroism of chiral solid state films. By coupling these imaging systems with a temperature controlled stage, we show that we can rapidly identify the thermal processing conditions required to maximise circular dichroism in chiral solid state films by measuring circular dichroism in situ during thermal annealing of a sample under test. The accuracy and spatial resolution of these circular dichroism imagers are cross-compared against our previous studies using an existing circular dichroism imaging system at the Diamond Light Source and are shown to be in good agreement, with a sensitivity down to 250 mdeg and a spatial resolution of 100 μm. 4:15pm - 4:30pm
ID: 261 / FS3&2 S01: 3 Focused Sessions 3: Chiroptical phenomena Chiral lattice resonances in 2.5-dimensional plasmonic arrays with achiral multipartite unit cells 1Instituto de Optica (IO-CSIC), Consejo Superior de Investigaciones Científicas, Spain; 2Department of Physics and Astronomy, University of New Mexico, USA Lattice resonances, collective electromagnetic modes supported by periodic arrays of metallic nanostructures, produce very strong and spectrally narrow optical responses. Recently, there has been significant effort devoted to exploring their chirality (dissymmetric response to right- and lefthanded circularly polarized light) in arrays built from complex unit cells. In this communication, we investigate the lattice resonances of square bipartite arrays in which the relative positions of the nanostructures can vary in all three spatial dimensions, i.e., 2.5- dimensional arrays. Despite the achirality of their unit cell, the lattice resonances supported by these systems can display an almost perfect chiral response and very large quality factors due to the constructive and destructive interference between the electric and magnetic dipoles induced in their nanostructures. Our results provide the fundamental understanding to achieve strong chiral lattice resonances in structurally achiral 2.5-dimensional periodic arrays. 4:30pm - 4:45pm
ID: 427 / FS3&2 S01: 4 Focused Sessions 2: Structured light Conversion of a beam carrying fractionnal angular momentum in High- Harmonics Generation 1Université Paris-Saclay, CEA, CNRS, LIDYL, France; 2Grupo de Investigación en Aplicaciones del Láser y Fotónica, Departamento de Física Aplicada, University of Salamanca, Salamanca E-37008, Spain; 3Instituto de Física, Universidade Federal Fluminense, 24210-346 Niterói, RJ, Brazil; 4Department of Physics, King’s College London, Strand Campus, WC2R 2LS, London, UK Exotic light fields combining non-trivial spin and angular momentum may not be eigenstates of either the spin or orbital angular momenta operators. For these fields, it is relevant to define a Generalized Angular Momentum operator of which they are eigenvectors. Their associated eigenvalues can take, depending on the case, non-integer values.We report that this new quantity is conserved via non-linear phenomena, such as High Harmonic Generation. 4:45pm - 5:00pm
ID: 197 / FS3&2 S01: 5 Focused Sessions 2: Structured light High-harmonic spectroscopy of solids driven by structured light University of Salamanca, Spain Understanding high-order harmonic generation (HHG) from solid targets holds the key of potential technological innovations in the field of high-frequency coherent sources. Solids present optical nonlinearities at lower driving intensities, and harmonics can be efficiently emitted due to the increased electron density in comparison with the atomic and molecular counterparts. In addition, crystalline solids introduce a new complexity, as symmetries play a role in the anisotropic character of the optical response. An extraordinary playground is, therefore, the scenario in which solids are driven by vector beams, since crystal symmetries can be directly coupled with the topology of the driving laser beam. In this contribution we analyze the topological properties of the HHG radiation emitted by a single-layer graphene sheet driven by a vector beam. We show that the harmonic field is a complex combination of vortices, whose geometrical properties hold information about the details of the non-linear response of the crystal. We demonstrate, therefore, that the analysis of the topological structure of the harmonic field can be used as a spectroscopic measurement technique, paving the way of topological spectroscopy as a new strategy for the characterization of the optical response of macroscopic targets. |
3:30pm - 5:00pm | TOM7 S03: Quantum-cascade & electro-optic frequency combs Location: Santenay/Chablis Session Chair: Piotr Maslowski, Nicolaus Copernicus University, Poland |
|
3:30pm - 3:45pm
ID: 332 / TOM7 S03: 1 TOM 7 Optical frequency combs Mid-infrared frequency combs based on single section interband cascade lasers 1Laboratoire de Physique de l’École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 75005 Paris, France; 2IES, Univ. Montpellier, CNRS, F-34000 Montpellier, France; 3C2N, CNRS-Univ. Paris-Sud, Univ. Paris-Saclay, 10 Avenue Thomas Gobert, F-91120 Palaiseau, France In this work we show Frequency Comb (FC) and short pulsed operation of mid-infrared Interband Cascade Lasers (ICLs) in a single long section. This is through the use of an adapted ultrafast Quantum Well Infrared Photodetectors (QWIPs), and correlating the microwave beatnotes with high resolution spectra of the ICL. In particular, we will show active mode-locking (ML) of single-section ICL that does not require RF optimisation of the ICL device and highlight its temporal characteristics using Shifted Wave Infrared Fourier Transform Spectroscopy (SWIFTS) analysis to reconstruct the intensity in the time domain. 3:45pm - 4:00pm
ID: 238 / TOM7 S03: 2 TOM 7 Optical frequency combs Multi-GHz repetition rate femtosecond electro-optic frequency comb based on one single phase modulator and non-linear processes 1Laboratoire Photonique Numérique et Nanosciences (LP2N), UMR 5298, CNRS-IOGS-Université Bordeaux, 33400 Talence, France; 2Institut Universitaire de France (IUF), 1 Rue Descartes, 75231 Paris, France We report on a multi-GHz repetition rate, femtosecond fiber laser operating in the burst mode, achieved by nonlinearly shaping and amplifying a phase-only modulated electro-optic comb at 1.03 μm. The system delivers an average power of 1.2 W with pulses compressible down to sub 100 fs. 4:00pm - 4:15pm
ID: 441 / TOM7 S03: 3 TOM 7 Optical frequency combs Tunable electro-optic frequency-comb generation around 8 µm wavelength 1Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France; 2L-NESS, Dipartimento di Fisica, Politecnico di Milano, Polo di Como, Via Anzani 42, 22100 Como, Italy Electro-optic frequency-comb is an interesting method for comb generation as it offers the possibility to electrically tune the generated frequency-comb by simply tuning the electrical signal applied on the modulator. Integrated modulators operating in a wide spectral range in the mid-IR have been demonstrated recently, relying on free carrier plasma dispersion effect in a Schottky diode embedded in a Ge-rich graded SiGe waveguide. Such integrated mid-infrared modulators have been used to generate electro-optic frequency-combs with more than 200 lines around the 8 µm wavelength optical carrier. 4:15pm - 4:30pm
ID: 465 / TOM7 S03: 4 TOM 7 Optical frequency combs Broadband THz quantum cascade laser frequency combs with surface emission and inverse-designed facet reflectors ETH Zurich, Switzerland We present a planarized waveguide cavity with an integrated broadband output coupler that improves both the output power and far-field properties of THz quantum cascade laser frequency combs. The laser mirror reflectivity can be tuned by the shape of the end facet, which is obtained with an efficient inverse design algorithm, where the structure is iteratively updated to match the desired figure of merit. Surface emission is achieved with a broadband patch-array antenna, and all the components have been optimized for octave-spanning emission spectra (2-4 THz). Experimentally, we demonstrate a broadband surface-emitting THz quantum cascade laser frequency comb with optical bandwidths of up to 800 GHz, surface emission into a narrow beam with divergence below (20° x 20°) and a peak power of 13 mW. 4:30pm - 4:45pm
ID: 390 / TOM7 S03: 5 TOM 7 Optical frequency combs L-band dual-comb based on gain-switched lasers for CO2 monitoring CEMDATIC - E.T.S.I. Telecomunicación, Universidad Politécnica de Madrid (UPM) This paper reports the development of a dual-comb spectroscopy system based on gain-switched single-mode laser diodes emitting at 1572 nm. The switching is performed by a train of short electrical pulses at a repetition rate of 100 MHz while the lasers are subjected to external optical injection. Under these conditions, broad and flat optical frequency combs (OFC) are generated, showing 100 tones within 10 dB and a line spacing fixed by the repetition rate of the switching pulses. The dual-comb generated by the interference of two such combs with slightly different line spacing, is used for measuring the absorption line of CO2 at 1572.02 nm. The transmission spectrum is analyzed and fitted to a Voigt profile. A deviation of 3% in the residuals of the fitting is obtained, denoting the high spectral performance of the spectroscopy system. 4:45pm - 5:00pm
ID: 361 / TOM7 S03: 6 TOM 7 Optical frequency combs Broadband and fast frequency chirped FTIR spectroscopy with strongly modulated quantum cascade lasers 1Institute for Quantum Electronics, ETH Zurich, CH-8093, Switzerland; 2Alpes Lasers, Avenue des Pâquiers 1, 2072 St Blaise, Switzerland While the opportunity to perform fast and broadband spectroscopy in the Mid-IR portion of the electromagnetic spectrum is very appealing, it requires the use of compatible light-sources. Here, we strongly modulate a Mid-Infrared Quantum Cascade Laser at a frequency in the RF domain, which is low compared to the natural repetition frequency of the device. In this way, we demonstrate that it is possible to obtain an emission bandwidth of up to 250𝐜𝐦−𝟏. Finally, we employ it as a light source in an FTIR based on a rotational delay line, performing fast and broadband FTIR spectroscopy. |
3:30pm - 5:00pm | TOM4 S03: Linear and Nonlinear Metasurfaces #1 Location: Musigny/Pommard/Volnay Session Chair: Mathieu Mivelle, CNRS, Sorbonne université, INSP, France |
|
3:30pm - 3:45pm
ID: 453 / TOM4 S03: 1 TOM 4 Nanophotonics Transmission Gratings relying on Huygens Metasurfaces for short-wave to long-wave infrared applications 1Fraunhofer Institute For Applied Optics And Precision Engineering, Germany; 2Friedrich-Schiller-Universität Jena, Germany 3:45pm - 4:00pm
ID: 237 / TOM4 S03: 2 TOM 4 Nanophotonics Robust method of metrology for direct phase measurement for nano-antennas Université Paris-Saclay, ONERA, Optique et techniques associées, 91123, Palaiseau, France. 4:00pm - 4:15pm
ID: 301 / TOM4 S03: 3 TOM 4 Nanophotonics Metasurface characterization by quantitative phase microscopy 1Université Cote d’Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis, 06560 Valbonne, France.; 2PHASICS - 91190 Saint-Aubin – France 4:15pm - 4:30pm
ID: 200 / TOM4 S03: 4 TOM 4 Nanophotonics Coherent all-optical steering of upconverted light by a nonlinear metasurface 1Politecnico di Milano, Italy; 2University of Brescia, Italy; 3Universitè de Paris, France; 4Université Paris-Saclay, France 4:30pm - 5:00pm
Invited ID: 511 / TOM4 S03: 5 TOM 4 Nanophotonics Optical properties and applications of laser-processed disordered plasmonic metasurfaces 1University of Lyon, University of Saint-Etienne, France; 2HID Global CID SAS, France |
3:30pm - 5:00pm | TOM5 S03: Optical materials, synthesis characterization and applications Location: Meursault/ Nuit ST-G./Corton Session Chair: Akira Satou, Tohoku University, Japan |
|
3:30pm - 4:00pm
Invited ID: 349 / TOM5 S03: 1 TOM 5 Optical Materials Polarization-anisotropy of mid-infrared emission properties of Er3+ ions in YAlO3 crystal 1Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS-ENSICAEN, Université de Caen Normandie, 6 Boulevard Maréchal Juin, 14050 Caen, France; 2Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 11 rue Pierre et Marie Curie, 75005 Paris, France; 3Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, 12489 Berlin, Germany; 4Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 230031 Hefei, China; 5Department of Optoelectronic Engineering, Jinan University, 510632 Guangzhou, China; 6CORIA UMR6614, CNRS-INSA-Université de Rouen Normandie, Normandie Université, 76801 Saint Etienne du Rouvray, France We report on a polarization-resolved study of mid-infrared emission properties of Er3+ ions in the orthorhombic YAlO3 crystal. For the 4I11/2 → 4I13/2 transition, σSE reaches 0.20×10-20 cm2 at 2919 nm (for light polarization E || c). Pump-induced polarization switching between the E || b and E || c eigen-states is observed in an 10 at.% Er:YAlO3 laser. Pumped by an Yb-fiber laser at 976 nm, this laser delivers 0.77 W at 2919 nm with a slope efficiency of 31.4% being close to the Stokes limit and a laser threshold of 33 mW. 4:00pm - 4:15pm
ID: 136 / TOM5 S03: 2 TOM 5 Optical Materials Analysis of the recording of Fibonacci lenses using photopolymers with 3-D diffusion model 1Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías, Universidad de Alicante, Apartado 99, E03080 Alicante, Spain; 2Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal. Universidad de Alicante, Apartado 99, E03080 Alicante, Spain; 3Departamento de Óptica, Farmacología y Anatomía. Universidad de Alicante. Apartado 99, E03080 Alicante, Spain In the present work, a 3-Dimensional diffusion model is proposed to predict the main properties of Diffractive Optical Elements (DOEs), recorded in photopolymers, including refractive index modulation and the evolution of the transverse intensity distribution. The model enables the selection of appropriate material characteristics based on the intended application of the DOE. Specifically, a PVA/AA photopolymer based on acrylamide is simulated using the proposed model, considering coverplating and index matching systems to mitigate the effects of thickness variation. In order to compare its properties using the suggested model, the simulation focuses on a Fibonacci Lens and the dependece of the intensity by the polymerization rate. Accordingly, axial intensity pattern is represented to prove the bifocal-behaviour of these diffractive lenses. 4:15pm - 4:30pm
ID: 363 / TOM5 S03: 3 TOM 5 Optical Materials Towards freeform manufacturing of ultra-low expansion glass optics Galatea Laboratory, Switzerland Ultra-Low-Expansion glass (ULE®) has become an important technological enabler of advanced imaging for astronomy and for extreme-UV lithography. A major limitation though, is that ULE® cannot be poured from the fluid state unlike ZERODUR® which renders costly to produce large and/or complex shapes from it. Beside mirrors, optical components are rarely made of ULE® despite it sharing many properties of pure fused silica glass. Here we explore how femtosecond laser processing combined with laser induced reflow can be used to structure ULE® glass with the goal of producing miniature optical components. To fulfil optical roughness requirements, we adopt a strategy based on first producing elementary shapes, such as cubes or cylinders, that we further topologically transform into sphere, ellipsoids or curved surfaces, using a laser-reflow process. The structural modification of the glass matrix induced by the reflow were investigated using Raman spectroscopy. Our result points to a densification of the glass but no apparent sign of crystallization or devitrification. Furthermore, to understand whether the thermo-mechanical properties were affected or not, the thermal expansion coefficient was estimated using a dilatometry technic based on a pseudo-bimorph micro-cantilevers in a temperature-controlled chamber. 4:30pm - 4:45pm
ID: 377 / TOM5 S03: 4 TOM 5 Optical Materials Exploration of responsive photonic arrays fabricated by two photon lithography 1School of Physics and AMBER, Trinity College Dublin, College Green, Dublin 2, Ireland; 2School of Chemistry and AMBER, Trinity College Dublin, College Green, Dublin 2, Ireland Responsive hydrogel photonic structures were fabricated using two-photon lithography. The design versatility of two-photon lithography provides for unprecedented manipulation of transmittance and reflectance spectra, producing distinct structural color. Hydrogel photonic structures have potential for wide range applications, in this instance we demonstrate examples of color transformation, reversible vapor sensing, and pH detection. 4:45pm - 5:00pm
ID: 386 / TOM5 S03: 5 TOM 5 Optical Materials Probing buried interfaces in SiOxNy thin films via ultrafast acoustics: the role transducing layer thickness Institute of Plasma Physics of the Czech Academy of Sciences, Czech Republic Probing buried interfaces in thin films is a crucial task in many fields, including optical coating. Ultrafast acoustics provide a means to characterize the interfaces by using an acoustic wave localized on the nanometer scale. We provide a brief overview of our thorough study of the interface between SiOxNy thin films and Si substrate by using both single-color and broadband picosecond acoustics. The experiment allows us to track the effect of stoichiometry on the acoustics wave propagation and transition over the layer-substrate interface. To optimize the experiment, we also created simulations to study the effect of optoacoustic layer thickness. We show that the used Ti layer features an optimum thickness between 5-10 nm to reveal details of the interface properties. |
5:15pm - 5:45pm | ICO Prize Plenary Speech by Bo Zhen Location: Amphithéatre Romanéé Conti Bo Zhen, the Winner of the ICO Prize in 2021 will present his awarded work on Optical bound states in the continuum, exceptional points, and other topological states in photonics |
5:45pm - 7:15pm | Industrial Optics Podium Session Location: Amphithéatre Romanéé Conti EOS, European Optical Society, joins forces with EPIC, the European Industry Consortium, to bridge the gap at this podium discussion on industrial optics on Tuesday 12 September! Speakers: Applied Materials, Gauthier Brière Asphericon, Sven Kiontke Imagine Optic, Samuel Bucourt Sylentsys, Pierre Brochard Tematys, Jacques Cochard |
7:15pm - 9:00pm | WINE AND CHEESE Networking reception Location: Hall des grands Echézeaux |