# Conference Agenda

 Session Overview Location: B035 Ground floor, 99 seats
 Date: Wednesday, 14/Sept/2022 9:00am - 10:30am TOM13 S04: Advances and Applications of Optics and PhotonicsLocation: B035Session Chair: M.Teresa Flores-Arias, Universidade de Santiago de Compostela, Spain 9:00am - 9:30amInvitedID: 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 - 9:45amID: 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 - 10:00amID: 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 - 10:15amID: 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 - 4:00pm TOM13 S05: Advances and Applications of Optics and PhotonicsLocation: B035Session Chair: Catarina Monteiro, INESCTEC, Portugal 2:30pm - 2:45pmID: 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 - 3:00pmID: 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 - 3:15pmID: 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 - 3:30pmID: 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 - 3:45pmID: 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 - 6:00pm TOM13 S06: Advances and Applications of Optics and PhotonicsLocation: B035Session Chair: Orlando Frazão, Physics, Portugal 4:30pm - 4:45pmID: 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 - 5:00pmID: 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 - 5:15pmID: 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 - 5:30pmID: 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 - 5:45pmID: 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 - 6:00pmID: 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 - 6:15pmID: 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.