Dr. Carlo Gigli Profile

Dr. Carlo Gigli

at Ecole Polytechnique Fédérale de Lausanne

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Publications (10)

SPIE Journal Paper | 25 January 2024 Open Access

Programming nonlinear propagation for efficient optical learning machines

Ilker Oguz, Jih-Liang Hsieh, Niyazi Ulas Dinc, Uğur Teğin, Mustafa Yildirim, Carlo Gigli, Christophe Moser, Demetri Psaltis

AP, Vol. 6, Issue 01, 016002, (January 2024) https://doi.org/10.1117/12.10.1117/1.AP.6.1.016002

KEYWORDS: Computer programming, Education and training, Nonlinear optics, Wavefronts, Spatial light modulators, Artificial neural networks, Geometrical optics, Image classification, Mathematical optimization, Photonics

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Proceedings Article | 12 August 2023 Presentation

Optical design using physics-inspired neural networks

Demetri Psaltis, Carlo Gigli, Amirhossein Saba

Proceedings Volume PC12622, PC126220I (2023) https://doi.org/10.1117/12.2679815

KEYWORDS: Optical design, Physics, Neural networks, Nonlinear optics, Optical tomography, Nanophotonics, Maxwell equations, Machine learning, Diffraction

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Proceedings Article | 17 March 2023 Presentation

Predicting nonlinear optical scattering with physics informed neural networks

Carlo Gigli, Amirhossein Saba, Ahmed Bassam Ayoub, Demetri Psaltis

Proceedings Volume PC12438, PC124380Q (2023) https://doi.org/10.1117/12.2651859

KEYWORDS: Neural networks, Light scattering, Scattering, Physics, Electromagnetic scattering, Refractive index, Maxwell's equations, Polarization, Partial differential equations, Optical components

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SPIE Journal Paper | 22 November 2022 Open Access

Physics-informed neural networks for diffraction tomography

Amirhossein Saba, Carlo Gigli, Ahmed Bassam Ayoub, Demetri Psaltis

AP, Vol. 4, Issue 06, 066001, (November 2022) https://doi.org/10.1117/12.10.1117/1.AP.4.6.066001

KEYWORDS: Tomography, Education and training, Refractive index, Neural networks, Diffraction, Scattering, Photonics, Statistical modeling, Multiple sclerosis, Polystyrene

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Proceedings Article | 3 October 2022 Presentation

Programming nonlinearities inside multimode fibers for optical computing (Conference Presentation)

Ilker Oguz, Jih-Liang Hsieh, Niyazi Ulas Dinc, Ugur Tegin, Mustafa Yildirim, Carlo Gigli, Christophe Moser, Demetri Psaltis

Proceedings Volume PC12225, PC1222501 (2022) https://doi.org/10.1117/12.2632627

KEYWORDS: Multimode fibers, Optical computing, Computer programming, Wavefronts, Nonlinear optics, Machine learning, Electro optical modeling, Transistors, Sensors, Semiconductor lasers

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Proceedings Article | 5 March 2021 Presentation

Nonlinear meta-lens with all dielectric metasurfaces

Carlo Gigli, Giuseppe Marino, Davide Rocco, Costantino De Angelis, Alberto Artioli, Julien Claudon, Jean-Michel Gérard, Giuseppe Leo

Proceedings Volume 11695, 116950G (2021) https://doi.org/10.1117/12.2578666

KEYWORDS: Second-harmonic generation, Dielectrics, Harmonic generation, Fresnel lenses, Thermal efficiency, Sapphire, Resonators, Plasmonics, Photonics, Nonlinear metamaterials

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Proceedings Article | 1 April 2020 Presentation

Enhancing and switching harmonic generation in plasmonic and dielectric nanoantennas (Conference Presentation)

Lavinia Ghirardini, Eva Aurelia Arianna Pogna, Attilio Zilli, Paolo Biagioni, Lamberto Duò, Giovanni Pellegrini, Francesco Rusconi, Andrea Locatelli, Luca Carletti, Davide Rocco, Carlo Gigli, Giuseppe Marino, Aristide Lemaître, Andrea Mazzanti, Giuseppe Della Valle, Xiaofei Wu, Bert Hecht, Giulio Cerullo, Giuseppe Leo, Costantino De Angelis, Marco Finazzi, Michele Celebrano

Proceedings Volume 11344, 113440J (2020) https://doi.org/10.1117/12.2554643

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Nanoscale optical integration is nowadays a strategic technological challenge and the ability of generating and manipulating nonlinear optical processes in sub-wavelength volumes is pivotal to realize efficient sensing probes and photonic sources for the next-generation communication technologies. Yet, confining nonlinear processes below the diffraction limit remains a challenging task because phase-matching is not a viable approach at the nanoscale. The localized fields associated to the resonant modes of plasmonic and dielectric nanoantennas offer a route to enhance and control nonlinear processes in highly confined volumes. In my talk I will discuss two nonlinear platforms based on plasmonic and dielectric nanostructures. The first relies on a broken symmetry antenna design, which brings about an efficient second harmonic generation (SHG). We recently applied this concept to an extended array of non-centrosymmetric nanoantennas for sensing applications. I will also show the evidence of a cascaded second-order process in Third Harmonic Generation (THG) in these nanoantennas. Recently, dielectric nanoantennas emerged as an alternative to plasmonic nanostructures for nanophotonics applications, thanks to their sharp magnetic and electric Mie resonances along with the low ohmic losses in the visible/near-infrared region of the spectrum. I will present our most recent studies on the nonlinear properties of AlGaAs dielectric nanopillars. The strong localized modes along with the broken symmetry in the crystal structure of AlGaAs allow obtaining more than two orders of magnitude higher SHG efficiency with respect to plasmonic nanoantennas with similar spatial footprint and using the same pump power. I will also discuss a few key strategies we recently adopted to optically switch the SHG in these antennas even on the ultrafast time scale. Finally, I will show how to effectively engineer the sum frequency generation via the Mie resonances in these nanoantennas. These results draw a viable blueprint towards room-temperature all optical logic operation at the nanoscale.

Proceedings Article | 10 March 2020 Presentation

Parametric down-conversion in semiconductor metasurfaces (Conference Presentation)

Giuseppe Marino, Adrien Borne, Carlo Gigli, Aristide Lemaître, Alberto Artioli, Jean-Michel Gérard, Giuseppe Leo

Proceedings Volume 11290, 112900L (2020) https://doi.org/10.1117/12.2545091

KEYWORDS: Semiconductors, Wafer bonding, Signal detection, Polarization, Semiconducting wafers, Coherence (optics), Photon polarization, Sum-frequency generation, Nonlinear optics, Nanolithography

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Proceedings Article | 10 March 2020 Presentation

Optical harmonic generation from semiconductor metasurfaces (Conference Presentation)

Carlo Gigli, Giuseppe Marino, Davide Rocco, Costantino De Angelis, Grégoire Beaudoin, Konstaninos Pantzas, Gilles Patriarche, Isabelle Sagnes, Aristide Lemaître, Giuseppe Leo

Proceedings Volume 11288, 112881C (2020) https://doi.org/10.1117/12.2544535

KEYWORDS: Harmonic generation, Semiconductors, Polarization, Diffraction, Optical properties, Metamaterials, Photonic crystals, Nonlinear optics, Modulation, Light scattering

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Proceedings Article | 26 February 2020 Paper

Fundamental limitations of ultra-flat resonant dielectric metasurfaces

Carlo Gigli, Pierre Chavel, Philippe Lalanne

Proceedings Volume 11290, 112900U (2020) https://doi.org/10.1117/12.2550172

KEYWORDS: Dielectrics, Chemical species, Silicon, Waveguides, Nanostructures, Refractive index, Diffractive optical elements, Particles, Titanium dioxide, Wavefronts

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Showing 5 of 10 publications

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