Conference Agenda

Topical Meetings and Sessions:

TOM 1 - Silicon Photonics and Guided-Wave Optics
TOM 2 - Computational, Adaptive and Freeform Optics
TOM 3 - Optical System Design, Tolerancing and Manufacturing
TOM 4 - Bio-Medical Optics
TOM 5 - Resonant Nanophotonics
TOM 6 - Optical Materials: crystals, thin films, organic molecules & polymers, syntheses, characterization and applications
TOM 7 - Thermal radiation and energy management
TOM 8 - Non-linear and Quantum Optics
TOM 9 - Opto-electronic Nanotechnologies and Complex Systems
TOM 10 - Frontiers in Optical Metrology
TOM 11 - Tapered optical fibers, from fundamental to applications
TOM 12 - Optofluidics
TOM 13 - Advances and Applications of Optics and Photonics
EU Project Session
Early Stage Researcher Session

More information on the Topical Meetings

Select a date or location to show only sessions at 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). The rest of the TOM sessions, EU project session, tutorials, and Early Stage Researcher session will be updated soon. Thank you for your patience!

Please note that all times are shown in the time zone of the conference. The current conference time is: 10th Dec 2022, 05:14:30am WET

Session Overview
Date: Friday, 16/Sept/2022
8:30am - 10:00amESRS: Early Stage Researcher Session
Location: B120
Session Chair: Baptiste Bruneteau, Teem Photonics, France
Session Chair: Isaac Doughan, University of Eastern Finland, Finland

This session is specially designed for participants in the first four years (full-time equivalent research experience) of their research careers and who have not been awarded a doctoral degree. We encourage PhD students to express their ideas and describe their scientific achievements to the conference audience.

ID: 276 / ESRS: 1
Early Stage Reserch Session

Optical characterization of DNA origami-shaped silver nanoparticles created through biotemplated lithography

Kabusure Mogasa Kabusure1, Petter Piskunen2, Jiaqi Yang1, Mikko Kataja1, Mwita Chacha1, Sofia Ojasalo2, Boxuan Shen2,3, Tommi Hakala1, Veikko Linko2,4

1Department of Physics and Mathematics, University of Eastern Finland, Yliopistokatu 2, P.O Box 111, FI-80101, Joensuu, Finland.; 2Biohybrid Materials, Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland.; 3Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17165 Stockholm, Sweden.; 4LIBER Centre, Aalto University, P.O. Box 16100 FI-00076, Aalto, Finland.

Here, we study optically resonant substrates fabricated using the previously reported BLIN (biotemplated lithography of inorganic nanostructures) technique with single triangle and bowtie DNA origami as templates. We present the first optical characterization of BLIN-fabricated origami-shaped silver nanoparticle patterns on glass surfaces, comprising optical transmission measurements and surface-enhanced Raman spectroscopy. The formed nanoparticle patterns are examined by optical transmission measurements and used for surface-enhanced Raman spectroscopy (SERS) of Rhodamine 6G (R6G) dye molecules.

ID: 409 / ESRS: 2
Early Stage Reserch Session

Chip integrated photonics for ion based quantum computing

Steffen Sauer

TU Braunschweig, Germany

Ion traps are a promising platform for the realisation of high-performance quantum computers. To enable the future scalability of these systems, integrated photonic solutions for guiding and manipulating the laser light at chip level are a major step. Such passive optical components offer the great advantage of providing beam radii in the μm range at the location of the ions without increasing the number of bulk optics. Different wavelengths, from UV to NIR, as well as laser beam properties, such as angle or polarisation, are required for different cooling and readout processes of ions.

We present simulation results for different optical photonic components, such as grating outcouplers or waveguide splitters and their applications on ion trap chips. Furthermore, we will introduce the experimental setup for the optical characterisation of the fabricated structures.

ID: 408 / ESRS: 3
Early Stage Reserch Session

Hybrid polymer-titania waveguides for highly integrated circuits

Isaac Doughan

University of Eastern Finland, Finland

Highly integrated photonic circuitry is facing challenges when considering low-cost manufacturing and low-power consumption devices [1]. Current silicon photonic platforms (Si, Si3N4, SiO2...) are providing efficient solutions but are not always versatile or compatible with applications requiring broadband operations such as sensing for instance. The main waveguide-based sensing mechanism relies on the probing of the outer medium with the evanescent tail of the guided mode. To obtain a high limit of detection together with high sensitivity, the overlap between the analyte and the evanescent tail of the mode must be increased as well as the length of the waveguide, which yields an increase of the footprint of the device and the propagation losses. Double spiral waveguides are heavily used for waveguide sensing, providing interaction length of several centimeters.

ID: 406 / ESRS: 4
Early Stage Reserch Session

Managing the beam profile of a low spatial coherence high-power diode laser for gain material pumping

Thomas Dubé


We report a spatial profile management method that allows us to homogenize and shape a beam emitted from a high-power diode stack used as a pump source in high-power laser front-end amplifiers. It is based on imaging the far-field profile produced by propagating the diode beam through an engineered diffuser.

ID: 407 / ESRS: 5
Early Stage Reserch Session

Towards a deterministic single atom trap in the evanescent field of a Whispering-Gallery-Mode resonator

Gabriele Maron

Humboldt Universität, Germany

Whispering-gallery-mode (WGM) resonators are monolithic structures that guide light by total internal reflection, and exhibit ultra-high Q factors in combination with a small optical mode volume. They provide lossless in- and out-coupling of light via tapered optical fibers, and allow one to reach the strong coupling regime of cavity-QED when coupling a single atom to their evanescent field. Furthermore, these resonators exhibit chiral (i.e. direction dependent) light-matter interaction, which makes them attractive atom-photon interfaces for novel quantum information processing devices.

ID: 410 / ESRS: 6
Early Stage Reserch Session

Towards Kerr micro-comb generation in tantalum pentoxide micro-resonators

Jake Daykin

University of Southampton, United Kingdom

We present the design, fabrication, simulation, and initial characterisation of tantalum pentoxide

(Ta2O5) optical waveguides and micro-ring resonators for the purpose of supercontinuum and frequency comb


We use Ta2O5 sputtered on oxidised silicon wafers as a wave-guiding layer. Ta2O5 presents a number of advantages over other commonly used materials in integrated photonics. The linear refractive index of Ta2O5 is similar to that of Si3N4 at 1550 nm, and the nonlinear refractive index of Ta2O5 has been reported to be a factor of 3 greater than that of stoichiometric Si3N4 and an order of magnitude greater than of Si, suggesting that Ta2O5 is an interesting material for the generation of Kerr frequency combs. Additionally, Ta2O5 can be doped with rare-earth elements, such as Er, Nd and Yb, which allows for the creation of waveguide lasers.

ID: 157 / ESRS: 7
Early Stage Reserch Session

Imprinting characteristics of droplet lenses on liquid-repelling surfaces into light

Valeriia Bobkova (Ahlborn)1, Eileen Otte2,3, Sarah Trinschek4, Cornelia Denz1

1University of Muenster, Germany; 2Geballe Laboratory for Advance Materials, Stanford University, USA; 3Center for Soft Nanoscience, University of Muenster, Germany; 4Department of Engineering Physics, Muenster University of Applied Sciences, Germany

We propose an experimental method that allows the investigation of droplets on liquid-repelling surfaces. The described technique goes beyond the standard imaging approaches and reveals a plethora of spatial droplet information, which is usually unavailable. Liquid droplet lenses shape the transmitted light field of a Gaussian laser beam passing though them, thereby forming refracted three-dimensional (3D) light landscapes. We investigate numerically and experimentally these 3D landscapes which are customized depending on the droplet shape as well as its refractive index, and demonstrate the encoding of droplet information. This approach can also be applied for analyzing droplets showing high-speed dynamics, in order to reveal even minimal shape deviations. The developed technique complements and therefor extend the existing conventional tools for the investigation of the droplets formed on liquid-repelling surfaces.

8:30am - 10:00amTOM1 S07: Silicon Photonics and Guided-Wave Optics
Location: B116
Session Chair: Daniele Melati, Université Paris-Saclay, France
8:30am - 9:00am
ID: 386 / TOM1 S07: 1
TOM 1 Silicon Photonics and Guided-Wave Optics

Strategies for non-volatile alteration of optical components based on mid index waveguides

Frederic Gardes

Southampton University, United Kingdom

We demonstrate a range of technique and materials enabling non-volatile alteration of optical components based on mid index waveguides for O and C band applications, fabricated using a CMOS compatible silicon nitride material using different silicon content.

9:00am - 9:30am
ID: 377 / TOM1 S07: 2
TOM 1 Silicon Photonics and Guided-Wave Optics

InP membrane technology platform for large scale photonic integration

Yiqing Jiao

Eindhoven University of Technology, Netherlands, The

InP membrane technology platform for large scale photonic integration

9:30am - 10:00am
ID: 404 / TOM1 S07: 3
TOM 1 Silicon Photonics and Guided-Wave Optics

Reconfigurable Optical Switches using phase-changing materials

Winnie N. Ye

Carleton University, Canada

We present the optical switches using phase changing cladding material. Two configurations of the optical switches will be investigated: one with serially-coupled microdisks and one with 2 x 2 Mach-Zehnder with dual suspended nanobeams. In this research, phase change material GSST is used to provide the stable cross and bar states corresponding to the amorphous and crystalline phases of the GSST, respectively. The unique integration of the switch design elements enables the nonvolatile resonant behavior, low switching power, low insertion loss and crosstalk, wide bandwidth, and fast switching times, for WDM switching applications. This work suggests an alternative switch configuration, in addition to the conventional thermo-optic and electro-optic switching in silicon photonics.

8:30am - 10:00amTOM10 S05: Frontiers in Optical Metrology: Microscopy
Location: B031
Session Chair: Poul-Erik Hansen, DFM, Denmark
8:30am - 9:00am
ID: 359 / TOM10 S05: 1
TOM 10 Frontiers in Optical Metrology

Can brillouin microscopy really measure mechanical properties of biomedical samples?

Török Peter

Nottingham Trent University, United Kingdom

Can Brillouin microscopy really measure mechanical properties of biomedical samples?

9:00am - 9:15am
ID: 299 / TOM10 S05: 2
TOM 10 Frontiers in Optical Metrology

Elementary, my dear Zernike: model order reduction for accelerating optical dimensional microscopy

Phillip Manley1,2, Jan Krüger3, Lin Zschiedrich1,2, Martin Hammerschmidt1,2, Bernd Bodermann3, Rainer Köning3, Philipp-Immanuel Schnieder1,2

1JCMwave GmbH, Bolivarallee 22, 14050 Berlin, Germany; 2Zuse Institute Berlin, Takustraße 7, 14195 Berlin, Germany; 3Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany

Dimensional microscopy is an essential tool for non-destructive and fast inspection of manufacturing processes. Standard approaches process only the measured images. By modelling the imaged structure and solving an inverse problem, the uncertainty on dimensional estimates can be reduced by orders of magnitude. At the same time, the inverse problem needs to be solved in a timely manner. Here we present a method of accelerating the inverse problem by reducing images to their elementary features, thereby extracting the relevant information and distinguishing it from noise. The resulting reduction in complexity allows the inverse problem to be solved more efficiently by utilize cutting edge machine learning based optimization techniques. By employing the techniques presented here, we are able to perform for highly accurate and fast dimensional microscopy.

9:15am - 9:30am
ID: 125 / TOM10 S05: 3
TOM 10 Frontiers in Optical Metrology

Near-process indirect surface characterization of laser-chemically produced removal contours

Merlin Mikulewitsch1, Dirk Stöbener1,2, Andreas Fischer1,2

1University of Bremen, Bremen Institute for Metrology, Automation & Quality Science (BIMAQ), Linzer Str. 13, 28359 Bremen, Germany; 2MAPEX Center for Materials and Processes, P. O. box 330 440, 28334 Bremen, Germany

The manufacturing rate of laser chemical machining (LCM) is currently restricted to avoid disruptive boiling bubbles in the process fluid. An increase necessitates adjustments to the laser beam or fluid properties. However, the current understanding of the surface removal mechanisms is insufficient to achieve a consistent removal quality under these conditions. For an improved process modeling, in-process measurements of the surface geometry, the surface temperature and the boiling bubbles are required. Due to the complex process environment, no suitable in-process measurement technique for the geometry or surface temperature exists. This contribution presents an indirect geometry measurement approach based on confocal fluorescence microscopy that offers the potential for near-process application in the LCM process environment. As a result, the micro-geometry of different surfaces is shown to be indirectly measurable under LCM-equivalent process conditions such as thick fluid layers or gas bubbles in the beam path. Furthermore, a combined fluorescence-based measurement of geometry and temperature is proposed.

9:30am - 9:45am
ID: 232 / TOM10 S05: 4
TOM 10 Frontiers in Optical Metrology

Alignment autocollimator-based microscope adjustment and its quality assessment

Jan Krüger, Detlef Bergmann, Matthias Sturm, Wolfgang Häßler-Grohne, Rainer Köning, Bernd Bodermann

Physikalisch-Technische Bundesanstalt (PTB), Germany

We report a custom microscope setup whose mechanical and optical components are adjusted by the means of an alignment autocollimator (AAC). Residual centring and angular misalignments of the components towards the microscope’s optical axis are below 500 µm and 1 mrad, respectively. We further perform measurements of dot structures with diameters close to the diffraction limit (nominal diameter = 200 nm; chrome on glass mask) as suitable measures for the evaluation of the microscope’s adjustment and to determine/ visualize the optical aberrations, which affect the image formation of microscopes.

9:45am - 10:00am
ID: 207 / TOM10 S05: 5
TOM 10 Frontiers in Optical Metrology

Nanoform evaluation approach using Mueller matrix microscopy and machine learning concepts

Tim Käseberg1, Jana Grundmann1, Stefanie Kroker2, Bernd Bodermann1

1Physikalisch-Technische Bundesanstalt, Germany; 2Institut für Halbleitertechnik, Laboratory for Emerging Nanometrology, Technische Universität Braunschweig, Germany

We realized an imaging Mueller matrix microscope for nanostructure characterization. For investigations on nanoform characterization via Mueller matrix images, we measured and simulated Mueller matrix images of specially designed nanostructures. As an approach towards machine learning evaluation in imaging ellipsometry, we calculated Haar-like features of the images and observed a higher sensitivity to subwavelength features in off-diagonal matrix elements compared to microscopy.

8:30am - 10:00amTOM5 & TOM8 S02: Joint session
Location: B035
Session Chair: Riad Haidar, Onera, France
8:30am - 9:00am
ID: 366 / TOM5 & TOM8 S02: 1
TOM 5 Resonant Nanophotonics

Quantum- and nanooptics with tunable microcavities

David Hunger

Karlsruhe Institute of Technology, Germany

Optical microcavities are a powerful tool to enhance light-matter interactions. This enables applications ranging from ultra-sensitive spectroscopy and sensing to quantum information. To achieve large cavity enhancement on a flexible platform, we have developed microscopic Fabry-Perot cavities based on laser-machined optical fibers.

In the context of sensing, we use microcavities for imaging and spectroscopy applications, as well as for sensing of dynamic properties of individual nanosystems. We have developed scanning cavity microscopy as a versatile method for spatially and spectrally resolved maps of various optical properties of a sample with ultra-high sensitivity. Simultaneous enhancement of absorptive, dispersive, and scattering signals promises intriguing potential for optical studies of nanomaterials, molecules and biological nanosystems.

For quantum information applications, we employ such cavities to realize efficient readout of individual spin-bearing quantum emitters by means of Purcell enhancement of fluorescence emission. We study solid state quantum emitters such as NV centers in diamond and rare earth ions, with the goal to realize a quantum repeater for long-distance quantum communication, and optically addressable multi-qubit registers as quantum computing nodes.

9:00am - 9:15am
ID: 209 / TOM5 & TOM8 S02: 2
TOM 5 Resonant Nanophotonics

Arcsine laws in an optical cavity

Vashist Gangigude Ramesh, Kevin Peters, Said Rodriguez

Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, Netherlands

The arcsine laws are an example of emergent statistical structure in nature manifesting in a variety of unrelated physical systems. However, their validity in optical systems has not yet been studied. We investigate the time-integrated intensity in a driven-dissipative linear optical cavity and observe, experimentally and via numerical simulations, that all three arcsine laws are obeyed by this quantity.

9:15am - 9:30am
ID: 112 / TOM5 & TOM8 S02: 3
TOM 8 Non-linear and Quantum Optics

Asymmetric comb waveguide for strong interactions between atoms and light

Nikos Fayard1, Adrien Bouscal2, Jeremy Berroir2, Alban Urvoy2, Tridib Ray2, Sukanya Mahapatra3, Malik Kemiche3, Juan-Ariel Levenson3, Jean-Jacques Greffet1, Kamel Bencheikh3, Julien Laurat2, Christophe Sauvan1

1Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127 Palaiseau, France; 2Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-Université PSL, Collège de France, 4 place Jussieu, 75005 Paris, France; 3Centre de Nanosciences et de Nanotechnologies, CNRS, Université Paris-Saclay, 91120 Palaiseau, France

We propose a new type of periodic dielectric waveguide that provides strong interactions between atoms and guided photons. We design an asymmetric comb waveguide that supports a slow mode with an unusual quartic dispersion around a zero-group-velocity point and an electric field that extends far into the air cladding for an optimal interaction with atoms. We calculate the potential of a two-color trap made by using blue-detuned and red-detuned guided modes. We show that cold Rubidium atoms can be trapped as close as 100 nm from the structure in a 1.3-mK-deep potential well. Finally, we calculate that, for atoms trapped at this position, the emission into guided photons is largely favored. The radiative decay rate into the guided slow mode is 10 times larger than the free-space decay rate and the beta factor is as high as 0.88

9:30am - 9:45am
ID: 187 / TOM5 & TOM8 S02: 4
TOM 5 Resonant Nanophotonics

Engineering high Q/V photonic modes in correlated disordered systems

Nicoletta Granchi1, Richard Spalding2, Kris Stokkereit2, Matteo Lodde3, Andrea Fiore3, Riccardo Sapienza4, Francesca Intonti1, Marian Florescu2, Massimo Gurioli1

1University of Florence, Italy; 2University of Surrey, UK; 3Eindhoven University of Technology, The Netherlands; 4Imperial College London, UK

Hyperuniform disordered (HuD) photonic materials have recently been shown to display several localized states with relatively high Q factors arising at the Photonic Band Gap edges. However, their spatial position is not predictable a priori. Here we experimentally benchmark through near-field spectroscopy, capable of sub-wavelength resolution in the near-IR range, the engineering of high Q/V resonant modes in a defect inside a HuD luminescent pattern. These deterministic modes, coexisting with Anderson-localized modes, have never been experimentally realized so far and are a valid candidate for implementations in optoelectronic devices due to the spatial isotropy of the HuD environment upon which they are built.

9:45am - 10:00am
ID: 173 / TOM5 & TOM8 S02: 5
TOM 8 Non-linear and Quantum Optics

Exceptional Precision of a Nonlinear Optical Sensor at a Square-Root Singularity

Kevin Peters, Said Rodriguez

Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands

We demonstrate a nonlinear optical resonator with exceptional sensitivity in noisy environments. Our sensor is a hysteretic resonator, which displays a signal with a square-root singularity where the sensitivity, precision and information content are enhanced.

10:00am - 10:30amCoffee Break
10:30am - 11:15amPLENARY SPEECH: Nuno M.R. Peres
Location: Auditorium
Session Chair: M.Teresa Flores-Arias, Universidade de Santiago de Compostela, Spain

Professor at University of Minho, Portugal

Title: Metallic gratings covered with 2D materials: a route to polaritonics

11:15am - 12:15pmClosing and Student Award Ceremony
Location: Auditorium

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