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: 9th Dec 2022, 11:32:29pm WET

Only Sessions at Location/Venue 
Session Overview
Location: B035
Ground floor, 99 seats
Date: Tuesday, 13/Sept/2022
11:30am - 1:00pmTOM13 S01: Advances and Applications of Optics and Photonics
Location: B035
Session Chair: M.Teresa Flores-Arias, Universidade de Santiago de Compostela, Spain
11:30am - 12:00pm
ID: 328 / TOM13 S01: 1
TOM 13 Advances and Applications of Optics and Photonics

Novel ultrafast structured EUV/x-ray sources from nonlinear optics

Carlos Hernández-García

Universidad de Salamanca, Spain

Coherent extreme-ultraviolet (EUV)/x-ray laser sources, structured in their temporal/spectral, spatial and angular momentum properties are emerging as unique tools to probe the nanoworld. One of the key ingredients for the emergence of such sources is the extraordinary coherence in the up-conversion of infrared laser sources through the highly nonlinear process of high-order harmonic generation. In this contribution we will review the advances during the last decade that led to the generation of structured EUV/x-ray sources, such as circularly polarized attosecond pulses, harmonic vortices with time-varying orbital angular momentum, ultrafast vector and vector/vortex beams, tunable high-order harmonic combs or attosecond pulse trains with time-dependent polarization states. The use of such sources is being already applied to the investigation of chiral matter or magnetic materials. In the latter case, structured ultrafast sources are very promising to achieve a complete understanding of the electronic and spin interactions that govern sub-femtosecond magnetization dynamics.

12:00pm - 12:15pm
ID: 213 / TOM13 S01: 2
TOM 13 Advances and Applications of Optics and Photonics

Characterisation of the stability and long-term evolution of the properties of a 45TW laser operating at 10Hz

Aarón Alejo1, Adrián Bembibre1, Juan Peñas1, José Benlliure1, Lucía Martín2, María Teresa Flores-Arias2,3

1Instituto Galego de Física de Altas Enerxías (IGFAE). Universidade de Santiago de Compostela (Spain); 2Laboratorio Láser de Aceleración y Aplicaciones (L2A2). Universidade de Santiago de Compostela (Spain); 3Instituto de Materials (iMATUS). Universidade de Santiago de Compostela (Spain)

Industrial quality applications of high-power lasers working at high repetition rates, including laser-driven particle acceleration, will require laser systems capable of operating in a stable and prolonged manner. Several factors can affect this stability, including the environment conditions, such as temperature or humidity, and the progressive heating of the optical components involved. Here we report on the evolution of the main laser parameters for a 45 TW system operating at 10 Hz, showing that a significant change in the wavefront and direction of propagation, even when the laser energy remains sufficiently constant. These results highlight the importance for future laser systems to integrate closed-loop beam tracking diagnostics that can correct the temporal evolution.

12:15pm - 12:30pm
ID: 126 / TOM13 S01: 3
TOM 13 Advances and Applications of Optics and Photonics

Ultraestable spatiotemporal characterization of optical vortices in the visible and near infrared

Miguel López-Ripa, Íñigo J. Sola, Benjamín Alonso

Grupo de Aplicaciones del Láser y Fotónica (ALF), Departamento de Física Aplicada, Universidad de Salamanca, Spain

We show the versatility of the bulk lateral shearing interferometer characterizing complex spatiotemporal structures in different spectral ranges. Specifically, we have characterized constant and time-varying optical vortices in the visible and near infrared spectral ranges respectively. The high stability of the system combined with its spectral versatility will ease the spatiotemporal characterization of ultrafast phenomena.

12:30pm - 12:45pm
ID: 174 / TOM13 S01: 4
TOM 13 Advances and Applications of Optics and Photonics

10 PW Peak Power Laser at the Extreme Light Infrastructure Nuclear Physics – status updates

Ioan Dancus1, Gabriel V Cojocaru1, Robert Schmelz1, Dan G Matei1, Lidia Vasescu1, Dmitrii Nistor1, Anda-Maria Talposi1,2, Vicentiu Iancu1,2, Gabriel P Bleotu1,2,3, Andrei Naziru1,2, Alexandru Lazar1, Alice Dumitru1, Antonia Toma1, Marius Neagoe1, Stefan Popa1,2, Saidbek Norbaev1, Cristian Alexe1, Andreea Calin1, Costin Ene1, Adrian Toader1, Nicolae Stan1, Mihai Caragea1, Sorin Moldoveanu1, Olivier Chalus4, Christophe Derycke4, Christophe Radier4, Sandrine Ricaud4, Vincent Leroux4, Caroline Richard4, François Lureau4, Andrei Baleanu5, Romeo Banici5, Alexandru Alincutei5, Iulian Moroianu5, Andrei Gradinariu5, Constantin Caldararu5, Cristian Capiteanu5, Daniel Ursescu1, Domenico Doria1, Ovidiu Tesileanu1, Takahisa Jitsuno1, Razvan Dabu1, Kazuo A Tanaka1, Sydney Gales1, Calin Alexandru Ur1

1Extreme Light Infrastructure - Nuclear Physics, IFIN-HH, Street Reactorului 30, 077125 Bucharest Magurele, Romania; 2Physics Doctoral School, Bucharest University, Magurele, Ilfov, 077125, Romania; 3LULI-CNRS, CEA, Université Sorbonne, École Polytechnique, Institut Polytechnique de Paris, F-91128 Palaiseau Cedex, France; 4Thales LAS France, 2 Avenue Gay Lussac, 78990 Élancourt, France; 5Thales Systems Romania, Soseaua Orhideelor 15a, 060071 Bucuresti, Romania

We have shown, for the first time in the world, the production of 10 PW peak power laser pulses and their propagation to an experimental area at the Extreme Light Infrastructure - Nuclear Physics (ELI-NP). We are also steadily running the laser system for experimental campaigns, increasing the output power levels delivered for experiments and fine-tuning the parameters of the laser pulses, the operational procedures, and the operational teams. During our presentation, we will show the laser developments at ELI-NP emphasizing the 10 PW peak power demonstrations and the latest results for the HPLS beam delivery.

2:30pm - 4:00pmTOM13 S02: Advances and Applications of Optics and Photonics
Location: B035
Session Chair: Susana Novais, INESCTEC, Portugal
2:30pm - 2:45pm
ID: 186 / TOM13 S02: 1
TOM 13 Advances and Applications of Optics and Photonics

Dispersion-managed monolithic all polarization-maintaining ultrafast Thulium-doped fiber oscillator

Benedikt Schuhbauer1, Andreas Wienke1,2, Frithjof Haxsen1, Jörg Neumann1,2, Dietmar Kracht1,2

1Laser Zentrum Hannover e.V., Hollerithalle 8, Hannover 30419, Germany; 2Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering Innovation Across Disciplines)

We report on our first results of a dispersion-managed monolithic polarization-maintaining ultrafast Thulium-doped fiber oscillator. The design incorporates only commercially available polarization-maintaining components and emits linearly polarized light with a polarization extinction ratio of over 17 dB . The observed optical pulse spectra with up to 10 nm width centered at 1961.5 nm beyond the water absorption lines support sub-1 ps pulse duration. The simple linear configuration and the wide spread availability of the used low cost polarization-maintaining fiber components makes the presented oscillator a valuable concept for an environmental stable seed source.

2:45pm - 3:00pm
ID: 198 / TOM13 S02: 2
TOM 13 Advances and Applications of Optics and Photonics

Comparison of simulation and experimental characterization of a 4-pass diode-pumped 4-active-mirrors 1053 nm laser amplifier

Thomas Hamoudi1, Hugo Chesneau1, Thomas Dubé1, Emma Dubois1, Manon Lamy1, Cédric Maunier1, Alain Braud2, Cesare Meroni2, Patrice Camy2, Sebastien Montant1

1CEA, CESTA, F-33116 Le Barp, France; 2CIMAP-ENSICAEN, 6 boulevard du Maréchal Juin, 14050 Caen Cedex, France

In this paper, we will discuss the performances of a 4-pass diode-pumped 4-active-mirrors laser amplifier. Numerical simulations along with experimental characterization paves the way to reach 1 J at 10 Hz pulse rate at 1053 nm. Both Nd :glass and Nd :Lu :CaF2 amplifier medium performances will be compared in this amplifier.

3:00pm - 3:15pm
ID: 229 / TOM13 S02: 3
TOM 13 Advances and Applications of Optics and Photonics

Controlling water-window high-harmonic generation with sub-cycle synthesized waveforms

Giulio Maria Rossi1,2, Roland E. Mainz1,2, Fabian Scheiba1,2, Miguel A. Silva-Toledo1,2, Maximilian Kubullek1,2, Franz X. Kärtner1,2

1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; 2Physics Department and The Hamburg Centre for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

We present the first results concerning synthesizer-driven high-harmonic generation that reach the water-window region. This approach holds the promise of offering greater spectral tunability in the generation of isolated attosecond pulses and at the same time of achieving higher photon-flux, required for attosecondresolved soft X-ray transient absorption experiments.

3:15pm - 3:30pm
ID: 231 / TOM13 S02: 4
TOM 13 Advances and Applications of Optics and Photonics

Unravelling an optical extreme learning machine

Duarte Silva1,2, Nuno Silva1,2, Tiago Ferreira1,2, Carla Rosa1,2, Ariel Guerreiro1,2

1INESC TEC, Portugal; 2Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Portugal

Extreme learning machines (ELMs) are a versatile machine learning technique that can be seamlessly implemented with optical systems. In short, they can be described as a network of hidden neurons with random fixed weights and biases, that generate a complex behaviour in response to an input. Yet, despite the success of the physical implementations of ELMs, there is still a lack of fundamental understanding about their optical implementations. This work makes use of an optical complex media to implement an ELM and introduce an ab-initio theoretical framework to support the experimental implementation. We validate the proposed framework, in particular, by exploring the correlation between the rank of the outputs, 𝑯, and its generalization capability, thus shedding new light into the inner workings of optical ELMs and opening paths towards future technological implementations of similar principles.

4:30pm - 6:00pmTOM13 S03: Advances and Applications of Optics and Photonics
Location: B035
Session Chair: Susana Silva, INESC TEC, Portugal
4:30pm - 4:45pm
ID: 259 / TOM13 S03: 1
TOM 13 Advances and Applications of Optics and Photonics

Wavelength-switchable L-band fiber laser assisted by ultrafast laser fabricated random reflectors

Rosa Ana Perez-Herrera1,2, Pablo Roldan-Varona3,4,5, Arturo Sanchez-Gonzalez1,2, Luis Rodriguez-Cobo4, Jose Miguel Lopez-Higuera3,4,5, Manuel Lopez-Amo1,2

1Department of Electrical, Electronic and Communication Engineering, Public University of Navarra, 31006 Pamplona, Spain; 2Institute of Smart Cities (ISC), Public University of Navarra, 31006 Pamplona, Spain; 3Photonics Engineering Group, University of Cantabria, 39005 Santander, Spain; 4CIBER-bbn, Instituto de Salud Carlos III, 28029 Madrid, Spain; 5Instituto de Investigacion Sanitaria Valdecilla (IDIVAL), 39005 Cantabria, Spain

A wavelength-switchable L-band erbium-doped fiber laser (EDFL) assisted by an artificially controlled backscattering (ACB) fiber reflector is here presented. This random reflector was inscribed by femtosecond (fs) laser direct writing on the axial axis of a multimode fiber with 50 µm core and 125 µm cladding with a length of 17 mm. This microstructure was placed inside a surgical syringe to be positioned in the center of a high-precision rotation mount to accurately control its angle of rotation. Only by rotating this mount, three different output spectra were obtained: a single wavelength lasing centered at 1574.75 nm, a dual wavelength lasing centered at 1574.75 nm and 1575.75 nm, and a single wavelength lasing centered at 1575.5 nm. All of them showed an optical signal-to-noise ratio (OSNR) of around 60 dB when pumped at 300 mW.

4:45pm - 5:00pm
ID: 135 / TOM13 S03: 2
TOM 13 Advances and Applications of Optics and Photonics

Scalar two-beam interference in spatial 2 by 2 unitary transformations

Atri Halder, Andreas Norrman, Jari Turunen, Ari T. Friberg

University of Eastern FInland, Finland

We study the evolution of several important physical quantities associated with scalar two-beam interference under 2 by 2 spatial unitary operations. In particular, we develop a geometrical framework to describe visibility, distinguishability, and concurrence, as well as their mutual connections and complementary features, in such transformations.

5:00pm - 5:15pm
ID: 175 / TOM13 S03: 3
TOM 13 Advances and Applications of Optics and Photonics

Detection of 3D coherence Stokes parameters with nanoscatterers

Mengwen Guo1,2, Andreas Norrman2,3, Ari T. Friberg2, Tero Setälä2

1Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China; 2Institute of Photonics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland; 3Photonics Laboratory, ETH Zurich, CH-8093 Zurich, Switzerland

We present a method to probe the spectral coherence Stokes parameters of a random nonparaxial optical field by using two dipolar nanoscatterers. The method is based on observing the intensity and polarization-state fringes of the interfering scattered fields in the far zone. We show that all nine coherence Stokes parameters at the nanoparticles can be fully determined through measurements in three directions.

5:15pm - 5:30pm
ID: 242 / TOM13 S03: 4
TOM 13 Advances and Applications of Optics and Photonics

Extracting complex refractive indices from THz-TDS data with artificial neural networks

Nicholas Thomas Klokkou1, Jon Gorecki2, James Shafto Wilkinson1, Vasilis Apostolopoulos1

1University of Southampton, United Kingdom; 2Queen Mary University of London

Terahertz time-domain spectroscopy (THz-TDS) benefits from high signal-to-noise ratios (SNR), however extraction of material parameters involves a number of steps which can introduce errors into the final result. We present the use of artificial neural networks (ANN) as the first step to achieve a comprehensive approach for the extraction of the complex refractive index from THz-TDS data. The ANN shows performance superior to approximation methods and has a more straightforward implementation than root finding methods. Deep and convolutional neural networks are demonstrated to accept an entire frequency range at once, providing a tool for fitting where SNR is low, producing a more stable result.

5:30pm - 5:45pm
ID: 130 / TOM13 S03: 5
TOM 13 Advances and Applications of Optics and Photonics

Free convection along pumped active mirror amplifying medium and its impact on laser wave propagation

Hugo Chesneau, Sébastien Montant

Commissariat à l’Energie Atomique et aux Energies Alternatives, Centre d’Etudes Scientifiques et Techniques d’Aquitaine, F-33116 Le Barp, France.

Using COMSOL Multiphysics, we simulate free convection along a pumped active mirror amplifying medium. We study the induced boundary layers and how it affects the wave front propagation. To comfort our simulations, we set up a Mach-Zehnder interferometer to characterize and measure the local variation of air refractive index and temperature.

Date: Wednesday, 14/Sept/2022
9:00am - 10:30amTOM13 S04: Advances and Applications of Optics and Photonics
Location: B035
Session Chair: M.Teresa Flores-Arias, Universidade de Santiago de Compostela, Spain
9:00am - 9:30am
ID: 322 / TOM13 S04: 1
TOM 13 Advances and Applications of Optics and Photonics

Advancing fluorescence microscopy and spectroscopy for the benefit of cell science and drug delivery

Ana I. Gómez-Varela1, Adelaide Miranda2, Dimitar Stamov3, Ricardo Gaspar2, Bruno Silva2, Pieter de Beule2

1Universidade de Santiago de Compostela, Spain; 2International Iberian Nanotechnology Laboratory; 3JPK BioAFM, Bruker Nano GmbH

Here we report on two recent advances we made applying advanced fluorescence microscopy and spectroscopy to advance the study of cell biology and drug delivery. At first, we detail a new instrumental set-up combining atomic force microscopy in liquid and super-resolution fluorescence microscopy in novel configuration such that long-term simultaneous and co-localized observation with both techniques becomes feasible. We believe this will contribute to the study of fast membrane activated cell-signalling processes in the years to come. Furthermore, we report on a novel application of Fluorescence Cross-Correlation spectroscopy (FCCS) for the characterization of lipid-nucleic acid complexes. We are able to determine the number of nucleic acid particles incorporated in each liposome, a parameter not readily accessible an ensemble basis with any other technique known. This parameter is crucial for co-delivery applications and we believe FCCS can play an important role in the future development of new drug delivery systems.

9:30am - 9:45am
ID: 253 / TOM13 S04: 2
TOM 13 Advances and Applications of Optics and Photonics

Micro-diffractive optical element arrays for beam shaping

Shima Gharbi Ghebjagh, Thomas Handte, Stefan Sinzinger

Technische Universität Ilmenau, Germany

We describe the design of Fourier type array generators and beam shapers as periodic configurations of refractive-diffractive optical elements in microscale to provide specific beam shaping and imaging functionalities. We investigate how the addition of micro-nanostructures to regular microstructure arrays enables new degrees of freedom for the design of micro-optical systems, in combination with adapted fabrication techniques yields a better optical performance and leads to enhancement of the array concept, uniformity and efficiency.

9:45am - 10:00am
ID: 270 / TOM13 S04: 3
TOM 13 Advances and Applications of Optics and Photonics

Experimental evaluation of Fourier transform holograms by a self-interferometric technique

Esther Nabadda1, Pascuala Garcia-Martinez2, María M. Sánchez-Lopez1, Ignacio Moreno1

1Universidad Miguel Hernandez, Spain; 2Universitat de València

We present a technique that combines an encoding method to display complex-valued holograms onto a phase-only spatial light modulator (SLM) with a phase-shifting interferometric (PSI) technique for experimentally evaluating the generated complex-valued optical fields. We demonstrate an efficient common-path polarization interferometer based on the SLM itself, not requiring any external additional element. The same setup can be used to simultaneously display the complex hologram and to apply the phase-shifting values required to retrieve the phase distribution of the optical field. A simple rotation of a polarizer allows to change from the intensity configuration to the interferometer configuration.

10:00am - 10:15am
ID: 298 / TOM13 S04: 4
TOM 13 Advances and Applications of Optics and Photonics

Measurement of ultrafast carrier dynamics in multilayer MPCVD graphene

Tânia M. Ribeiro1, Tiago E. C. Magalhães1, Bohdan Kulyk2, Alexandre F. Carvalho2, António J. S. Fernandes2, Florinda M. Costa2, Helder Crespo1

1Instituto de Física de Materiais Avançados, Nanotecnologia e Fotónica (IFIMUP), Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre s/n, 4169-007 Porto, Portugal; 2I3N, Departamento de Física, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal

Graphene presents unique opto-electronic properties which makes it useful for a wide range of applications and devices, such as high-speed photodetectors, that rely on the relaxation dynamics of photoexcited charge carriers. These demand reliable and reproducible methods for synthesis of high quality graphene. Here we present ultrafast degenerate pump-probe measurements of multilayer graphene coatings grown by microwave plasma chemical vapour deposition (MPCVD) and analyse the impact of the synthesis growth time on the material’s nonequilibrium optical response.

2:30pm - 4:00pmTOM13 S05: Advances and Applications of Optics and Photonics
Location: B035
Session Chair: Catarina Monteiro, INESCTEC, Portugal
2:30pm - 2:45pm
ID: 141 / TOM13 S05: 1
TOM 13 Advances and Applications of Optics and Photonics

Spectral scaling transformations of nonstationary light

Jyrki Laatikainen1, Matias Koivurova2, Jari Turunen1, Tero Setälä1, Ari T. Friberg1

1University of Eastern Finland, Finland; 2Tampere University, Finland

We present optical systems, which transform isodiffracting nonstationary beams into fields obeying either cross-spectral purity or spectral invariance. The designs are hybrid refractive-diffractive imaging systems, which are able to perform the desired transformations over a broad spectral bandwidth and irrespective of the state of spatial coherence of the input beam.

2:45pm - 3:00pm
ID: 206 / TOM13 S05: 2
TOM 13 Advances and Applications of Optics and Photonics

Cross-spectral purity for nonstationary optical fields

Meilan Luo1,2, Jyrki Laatikainen1, Atri Halder1, Matias Koivurova3, Tero Setälä1, Jari Turunen1, Ari T. Friberg1

1University of Eastern Finland, Finland; 2Hunan Normal University, China; 3Tampere University, Finland

We derive an extended reduction formula for the time-integrated coherence function starting from the cross-spectral purity conditions for nonstationary optical fields. Two types of separable cross-spectral density functions that ensure cross-spectral purity are introduced and their implications are discussed.

3:00pm - 3:15pm
ID: 219 / TOM13 S05: 3
TOM 13 Advances and Applications of Optics and Photonics

A φ-Shaped Bending-Optical Fiber Sensor for the Measurement of Radial variation in Cylindrical Structures

Victor Henrique Rodrigues Cardoso1,4, Paulo Caldas4,5, M. Thereza R. Giraldi2, Orlando Frazão3,4, João Weyl Costa1, José L. Santos3,4

1Federal University of Pará, Applied Electromagnetism Laboratory, Rua Augusto Corrêa, 01, 66075-110, Belém, Pará, Brazil; 2Military Institute of Engineering, Laboratory of Photonics, Praça Gen. Tibúrcio, 80,22290-270, Rio de Janeiro, Brazil; 3Department of Physics and Astronomy, Faculty of Sciences of University of Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal; 4nstitute for Systems and Computer Engineering, Technology and Science, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal; 5Polytechnic Institute of Viana do Castelo, Rua Escola Industrial e Comercial de Nun’Álvares, 4900-347, Viana do Castelo, Portugal

This work presents preliminary results of the $\phi$ -shaped sensor mounted on support designed by additive manufacturing (AM). This sensor is proposed and experimentally demonstrated to measure the radial variation of cylindrical structures. The sensor presents an easy fabrication. The support was developed to work using the principle of leverage. The sensing head is curled between two points so that the dimension associated with the macro bend is changed when there is a radial variation. The results indicate that the proposed sensor structure can monitor radial variation in applications such as pipelines and trees.

3:15pm - 3:30pm
ID: 114 / TOM13 S05: 4
TOM 13 Advances and Applications of Optics and Photonics

How can asphalt mixtures be smart?

Iran Rocha Segundo1,2, Salmon Landi Jr.3, Cátia Afonso2, Orlando Lima Jr.1, Elisabete Freitas1, Verônica Castelo Branco4, Manuel Filipe Costa5, Joaquim Carneiro2

1ISISE, Department of Civil Engineering, University of Minho, Azurém Campus, Guimarães, Portugal; 2Centre of Physics of Minho and Porto Universities (CF-UM-UP), University of Minho, Azurém Campus, Guimarães, Portugal; 3Federal Institute of Education, Science and Technology Goiano, Rio Verde – GO, Brazil; 4Transportation Engineering Department, Federal University of Ceará, Fortaleza, Brazil; 5Centre of Physics of Minho and Porto Universities (CF-UM-UP), University of Minho, Gualtar Campus, Braga, Portugal

The functionalization of asphalt mixtures is carried out in order to provide new capabilities to the road pavements, with major social, environmental and financial benefits. Optical characterization techniques as well as optical processes like photocatalysis play a major role in the development of new asphalt mixtures with smart functions. These advanced capabilities which are being developed in asphalt mixtures are: photocatalytic, superhydrophobic, self-cleaning, de-icing/anti-ice, self-healing, thermochromic, and latent heat thermal energy storage. The main objective of this research work is to stress the importance of optics and photonics technologies giving an overview of advanced functionalized smart asphalt mixtures.

3:30pm - 3:45pm
ID: 399 / TOM13 S05: 5
Post Deadline submission

Padé resummation of divergent Born series and its motivation by analysis of poles

Thomas van der Sijs, Omar El Gawhary, Paul Urbach

Delft University of Technology, Faculty of Applied Sciences, Optics Research Group, Delft, The Netherlands

The Born series is in principle a powerful way to solve electromagnetic scattering problems.

Higher-order terms can be computed recurrently until the desired accuracy is obtained. In practice, however, the series solution often diverges, which severely limits its use. We discuss how Padé approximation can be applied to the Born series to tame its divergence. We apply it to the scalar problem of scattering by a cylinder, which has an analytical solution that we use for comparison. Furthermore, we improve our understanding of the divergence problem by analyzing the poles in the analytical solution. This helps build the case for the use of Padé approximation in electromagnetic scattering problems. Additionally, the poles reveal the region of convergence of the Born series for this problem, which agrees with actual calculations of the Born series.

4:30pm - 6:00pmTOM13 S06: Advances and Applications of Optics and Photonics
Location: B035
Session Chair: Orlando Frazão, Physics, Portugal
4:30pm - 4:45pm
ID: 269 / TOM13 S06: 1
TOM 13 Advances and Applications of Optics and Photonics

Multi-well platform manufacturing combining stereolithography and pulsed laser ablation for cellular studies

Bastián Carnero1,2, Carmen Bao-Varela1, Ana I. Gómez-Varela1, Ezequiel Álvarez3,4,5, M. Teresa Flores-Arias1

1Photonics4Life research group, Departmento de Física Aplicada, Facultade de Física and Instituto de Materiais (iMATUS), Universidade de Santiago de Compostela; 2BFlow S.L.; 3Departamento de Farmacoloxía, Farmacia e Tecnoloxía Farmacéutica, Universidade de Santiago de Compostela; 4Instituto de Investigación Sanitaria de Santiago de Compostela (IDIS); Fundación IDIS, SERGAS; 5CIBERCV

Novel cell culture platforms, with more physiological surface roughness, require different technologies capable of precisely micropattern substrates. 3D printing offers a considerable accuracy and user-friendly procedures. For its part, pulsed laser ablation proves to be a versatile technology to perform detailed surface micropatterning. In this work, both technologies were combined to easily fabricate a versatile PDMS multi-well platform for performing cellular studies on a micropatterned biocompatible surface.

4:45pm - 5:00pm
ID: 260 / TOM13 S06: 2
TOM 13 Advances and Applications of Optics and Photonics

Celebrating a face-to-face congress of young researchers in Optics after the pandemic years: the I NW MYRO

Bastián Carnero1, Alba de las Heras2, Alejandro Doval1, Alex Martín-Rodríguez2, Alicia Muñoz-Ramos1, Ana García-Cabrera2, C. Damián Rodríguez-Fernández1, Damián Insua-Costa1, Irene Romo-Díez1, Isabel Rodríguez-Pérez2, Javier Prada-Rodrigo2, Javier Varela-Carballo1, José Paz-Martín1, María Sánche-Hernández2, M. Jesús Martínez-Morillo2, Mario Guerras-Rodríguez2, Millán Pérez2, Sabela Fernández-Rodicio1, Verónica Villa-Ortega1, Víctor W. Segundo-Staels2, M. Teresa Flores-Arias1

1Dissemination Group and Students Association LUZADA, USC-OPTICA Student Chapter and Santiago USC Young Minds Section; 2OSAL Student Chapter

This contribution reports the organization and celebration after the Covid-19 pandemic of a singular scientific conference focused on early-career researchers from the Spanish universities of Santiago de Compostela and Salamanca: the “I Northwest Meeting of Young Researchers in Optics (I NW MYRO)”.

5:00pm - 5:15pm
ID: 155 / TOM13 S06: 3
TOM 13 Advances and Applications of Optics and Photonics

Fluorescence for non-contact detection of salmon lice in fish farms

Kari Anne Hestnes Bakke, Jon Tschudi, Trine Kirkhus

SINTEF, Norway

This work presents a promising method for automatic non-contact detection and counting of salmon lice infested on salmon in an aquacultural farm setting. The method uses fluorescence in the visual part of spectrum to enhance the contrast between fish skin and lice. The wavelengths used are compatible with an underwater measurement system.

5:15pm - 5:30pm
ID: 139 / TOM13 S06: 4
TOM 13 Advances and Applications of Optics and Photonics

Imaging of water samples for the detection and identification of microplastics

Matthieu Roussey1, Boniphace Kanyathare1, Blaž Hrovat2, Nikolaos Papamatthaiakis3, Joni Hattuniemi4, Benjamin O. Asamoah1, Antti Haapala3, Arto Koistinen2, Kai-Erik Peiponen1

1Department of Physics and Mathematics, Institute of Photonics, 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 Forest Sciences, University of Eastern Finland, PO Box 111, 80101 Joensuu, Finland; 4Valmet Automation Inc., Kehräämöntie 3, 87400 Kajaani, Finland

We demonstrate that direct imaging is a powerful tool for the detection and recognition of microplastics in water, even in case of complex matrices. We use a commercial high-resolution imagining device (FS5, Valmet Oy.) originally developed for the observation of wood fibres in papermill water systems. We show how to discriminate microplastics from other particles in suspension in real water samples. We show differences between several common plastic types in homemade samples.

5:30pm - 5:45pm
ID: 250 / TOM13 S06: 5
TOM 13 Advances and Applications of Optics and Photonics

Quadrics for structuring invariant space-time wave packets

Pierre Béjot, Bertrand Kibler

Laboratoire ICB - CNRS, France

We provide a general approach for structuring invariant 3D+1 optical wave packets in both bulk and structured dispersive media, through a simple engineering of phase-matched space-time frequencies on quadric surfaces.

5:45pm - 6:00pm
ID: 306 / TOM13 S06: 6
TOM 13 Advances and Applications of Optics and Photonics

Plug and play colorimetric carbon dioxide sensor

Nuno alexandre Mendes1,2, João Pedro Mendes2,3, Pedro Alberto Jorge1,2, Luís Carlos Coelho1,2

1Department of Physics and Astronomy, Faculty of Sciences of University of Porto; 2INESC TEC – Institute for Systems and Computer Engineering, Technology and Science, and Faculty of Sciences of University of Porto; 3Chemistry Research Unit – Chemistry and Biochemistry Department, Faculty of Sciences of University of Porto

Carbon dioxide measurement is an important endeavor in many industries such as food packaging, grain storage and health industry. This work presents a reversible, plug and play and low-cost colorimetric CO2 sensor calibrated in a proper concentration ranging from 1% to 3% of CO2. The sensor showed potential for improvement to increase resolution, for measuring lower CO2 concentrations and for more accurate readings.

6:00pm - 6:15pm
ID: 245 / TOM13 S06: 7
TOM 13 Advances and Applications of Optics and Photonics

Automation strategies and machine learning algorithms towards real-time identification of optically trapped particles

João Miguel Oliveira1,2, Vicente Vieira Rocha1,2, Nuno A. Silva1,2, Pedro A. S. Jorge1,2

1INESC, Portugal; 2Dep. de Física e Astronomia da Universidade do Porto

To automatically trap, manipulate and probe physical properties of micron-sized particles is a step of paramount importance for the development of intelligent and integrated optomicrofluidic devices. In this work, we aim at

implementing an automatic classifier of micro-particles immersed in a fluid based on the concept of optical tweezers. We describe the automation steps of an experimental setup together with the implemented classification models using the forward scattered signal. The results show satisfactory accuracy around 80% for the identification of the type and size of particles using signals of 250 milliseconds of duration, which paves the path for future improvements towards real-time analysis of the trapped specimens.

Date: Thursday, 15/Sept/2022
4:00pm - 5:30pmTOM5 & TOM8 S01: Joint session
Location: B035
Session Chair: Said Rodriguez, AMOLF, Netherlands, The
4:00pm - 4:30pm
ID: 365 / TOM5 & TOM8 S01: 1
TOM 8 Non-linear and Quantum Optics

Photo-induced nonlinearities in silicon nitride nanophotonics

Camile-Sophie Bres

Photonic Systems Laboratory, EPFL, Switzerland

We cover recent work on photo-induced second order nonlinearities in silicon nitride waveguides and microresonators. The all-optical inscription of second order nonlinearity through the coherent photogalvanic process has been shown to allow for efficient and versatile second harmonic generation, as well as difference-frequency generation and spontaneous parametric down conversion in waveguides. We will show that such all-optical poling also occurs in resonators combining resonant enhancement without sacrificing tunability. In addition, we confirm that several multiphoton absorption processes can occur simultaneously, allowing for the inscription of distinct charge gratings for quasi-phase matching of several 2nd order nonlinear processes in the same device. Such flexible second order nonlinearity phase matching capability positions silicon nitride, as an excellent platform to explore complex physics of combined second and third order nonlinear effects in integrated photonics

4:30pm - 4:45pm
ID: 203 / TOM5 & TOM8 S01: 2
TOM 8 Non-linear and Quantum Optics

Spontaneous parametric down-conversion from GaAs nanowires at telecom wavelength

Grégoire Saerens1, Ngoc My Hanh Duoeng1, Alexander Solntsev2, Artemios Karvounis1, Thomas Dursap3, Philippe Regreny3, Andrea Morandi1, Robert J. Chapman1, Andreas Maeder1, Alexandre Danescu3, José Penuelas3, Nicolas Chauvin3, Rachel Grange1

1ETH Zuerich, Optical Nanomaterial Group, Institute for Quantum Electronics, Department of Physics, 8093 Zuerich, Switzerland; 2University of Technology Sydney, School of Mathematical and Physical Sciences, Ultimo NSW 2007, Australia; 3Univ. Lyon, CNRS, ECL, INSA Lyon, UCBL, CPE Lyon, INL, UMR 5270, 69130 Ecully, France

We report on the generation of photon pairs at 1550 nm from free-standing epitaxially grown self-assisted micrometre long GaAs nanowires. The efficiency of the spontaneous parametric down-conversion process has a rate of 320 GHz/Wm normalized to the transmission of the setup, the pump intensity, and the volume of the nanostructure. GaAs is a high index dielectric that can support electromagnetic Mie modes, therefore we model how shorter nanowires could improve the second-harmonic signal and we found that sub-micro long nanowires (600 nm length and 250 nm diameter) can support quality factors up to 15 at the pump wavelength (780 nm). We anticipate that the near field enhancement compared to micrometre long nanowires will boost the second-harmonic generation and, correspondingly, the biphoton rate efficiency.

4:45pm - 5:00pm
ID: 247 / TOM5 & TOM8 S01: 3
TOM 8 Non-linear and Quantum Optics

Cooperative spontaneous four-wave mixing in single-channel and dual-channel sequences of side-coupled ring resonators

Amideddin Mataji-Kojouri1, Massimo Borghi1, Federico A. Sabattoli1, Houssein El Dirani2, Laurene Youssef3, Camille Petit-Etienne3, Erwine Pargon3, John E. Sipe4, Marco Liscidini1, Corrado Sciancalepore2, Matteo Galli1, Daniele Bajoni5

1Dipartimento di Fisica, Università di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy; 2Univ. Grenoble Alpes, CEA-Leti, 38054 Grenoble cedex, France; 3Univ. Grenoble Alpes, CNRS, LTM, 38000 Grenoble, France; 4Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON, M5S 1A7, Canada; 5Dipartimento di Ingegneria Industriale e dell’Informazione, Università di Pavia, Via Adolfo Ferrata 5, 27100 Pavia, Italy

Cooperative photon pair generation by Spontaneous Four-Wave Mixing (SFWM) process in single-channel and dual-channel side-coupled ring resonator sequences is investigated. Our analysis shows that super-linear growth of generation rate with respect to the number of rings is possible even in presence of loss. Experimental evidence of super-SFWM is provided by comparing individual and collective generation rates obtained from a dual-channel ring resonator sequence. The results are in good agreement with theory and suggest that high photon pair generation rates can be achieved from integrated silicon ring resonator sequences without initiating nonlinear absorption processes.

5:00pm - 5:15pm
ID: 158 / TOM5 & TOM8 S01: 4
TOM 5 Resonant Nanophotonics

Towards harmonic generation enhancement on silicon

Laura Rodríguez1, Michael Scalora2, Crina Cojocaru1, Neset Akozbek3, Ramon Vilaseca1, Jose Trull1

1Universitat Politècnica de Catalunya, Physics Department, Rambla Sant Nebridi 22, 08222 Terrassa, Spain; 2Aviation and Missile Center, US Army CCDC, Redstone Arsenal, Huntsville, AL, United States; 3US Army Space & Missile Defense Command, Tech Center, Redstone Arsenal, AL 35898, United States

Nowadays, nanostructures are routinely fabricated and integrated in different photonic devices for a variety of purposes and applications. For instance, nonlinear silicon photonics is an area of interest due to its high compatibility with CMOS technology, offering structure sizes down to 10nm at low cost. When the nanoscale is reached, light-matter interactions can display new phenomena, conventional approximations may not always be applicable, and new strategies must be sought in order to study and understand light-matter interactions at the nanoscale. In this work, we report a comparative experimental and theoretical study of second and third harmonic generation from silicon with the aim of explaining the nonlinear optical properties of this material at the nanoscale. We measure second and third harmonic efficiencies as a function of angle of incidence, polarization and pump wavelength. We compare these measurements with numerical simulations based on a microscopic hydrodynamic model which accounts for different possible contributions to the nonlinear polarization. This way, we have the ability to explain properly the SH and TH signals arising from different silicon samples. Once we have this knowledge, we are able to design more complex structures, such as silicon nanowires, where higher conversion efficiencies can be achieved.

5:15pm - 5:30pm
ID: 272 / TOM5 & TOM8 S01: 5
TOM 5 Resonant Nanophotonics

Controlling the nonlinear excitation of perovskite nanocrystals by a chiral dielectric metasurface

Ilka Vincon1, Fedja J. Wendisch2, Daniele De Gregorio2, Stefanie D. Pritzl1, Quinten A. Akkerman1, Haoran Ren3,2, Leonardo de S. Menezes2,4, Stefan A. Maier5,2, Jochen Feldmann1

1Chair for Photonics and Optoelectronics, Nano-Institute Munich, LMU, Königinstraße 10, 80539 Munich, Germany; 2Chair in Hybrid Nanosystems, Nano-Institute Munich, LMU, Königinstraße 10, 80539 Munich, Germany; 3MQ Photonics Research Centre, Macquarie University, Macquarie Park, NSW 2109, Australia; 4Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife-PE, Brasil; 5School of Physics and Astronomy, Monash University, Clayton Victoria 3800, Australia

We demonstrate that pronounced chiral resonances of a dielectric metasurface can be applied to induce polarization effects in two-photon absorption processes of inorganic perovskite nanocrystals. In our hybrid system, a monolayer of cubic all-inorganic lead halide perovskite nanocrystals was deposited on a z-shaped Si-metasurface. The two-photon excited photoluminescence emission of the perovskite nanocrystals is enhanced by up to one order of magnitude in this configuration. In particular, the enhancement is controllable by the excitation wavelength and by its polarization. This demonstrated control of perovskite light emission can become highly relevant for sensing and display technologies.

Date: Friday, 16/Sept/2022
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.


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