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 and polymers, syntheses, characterization and devices
TOM 7 - Thermal radiation and energy management
TOM 8 - Nonlinear and Quantum Optics
TOM 9 - Optics at Nanoscale (ONS)
TOM 10 - Optical Microsystems (OMS)
TOM 11 - Waves in Complex Photonic Media
TOM 12 - Optofluidics
TOM 13 - Ultrafast Optical Technologies and Applications
TOM 14 - Advances and Applications of Optics and Photonics
EU Project Session
Early Stage Researcher Session organised by SIOF
Grand Challenges of Photonics Session
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Please note that all times are shown in the time zone of the conference. The current conference time is: 29th June 2022, 07:51:23 CEST
Combining tunable light absorption characteristics with the generation of hot carriers, plasmonic-metal nanostructures offer unique opportunities for light energy harnessing and conversion devices, from photodetectors to photoelectrochemical cells. In this talk I will show examples of functional devices and discuss in-depth the underlying physical mechanisms, with a special attention to the role of the metal properties. In particular, I will report recent results on ultrafast dynamics of hot holes as well as solid-state investigation of copper-based systems and I will discuss new opportunities for material synthesis and solar-energy storage applications.
Towards perfect metallic behavior in optical resonant absorbing nanostructures
Clément Verlhac1, Mathilde Makhsiyan1, Riad Haidar1,2, Jérôme Primot1, Patrick Bouchon1
1DOTA, ONERA, Université Paris-Saclay, F-91123 Palaiseau, France; 2Ecole polytechnique, Département de Physique, 91128 Palaiseau, France
Looking for a perfect metallic behavior is a crucial research line for metamaterials scientists. We propose a versatile strategy based on a contrast of dielectric index to control dissipative losses in metals within waveguides and resonant nanostructures. This permits to tune the quality factor of the guided mode and of the resonant absorption over at least four orders of magnitude. This concept is applied to a practical design that permits to finely control the localization of dissipation in an absorbing photonic structure.
We present our experimental results on the photoluminescent behavior of single-crystalline ultra-thin gold films with respect to an externally varied temperature. We attempt to clarify the origin of photoluminescence in gold and the role of the local heat in its electronic transitions.
Alice Fabas1, Hasnaa El Ouazzani1, Jean-Paul Hugonin2, Jean-Jacques Greffet2, Riad Haidar1,3, Patrick Bouchon1
1DOTA, ONERA, Université Paris-Saclay, 91123 Palaiseau, France; 2Laboratoire Charles Fabry, Institut d’Optique Graduate School, CNRS, Université Paris-Saclay, 91127 Palaiseau, France; 3Ecole Polytechnique, Département de Physique, 91128 Palaiseau, France
Metallic nano-structures exhibit high electric field enhancements at their surfaces, which makes them of great interest when it comes to infrared spectroscopy. Here, we propose a new paradigm for surface-enhanced infrared absorption (SEIRA) spectroscopy. We show that a resonator initially out of tune moves towards a configuration of critical coupling when molecules are added on the surface. It makes possible to significantly increase the sensitivity of SEIRA. This concept is applied, both theoretically and experimentally, to the detection of a monolayer of octadecanethiol and of the explosive precursor 2,4-dinitrotoluene.
Computation of the Mueller matrix elements for pseudo-chiral and achiral meta-surfaces
Jayeeta Amboli1, Guillaume Demesy1, Brian Stout1, Bruno Gallas2, Nicolas Bonod1
1Institute Fresnel, Aix-Marseille University, France; 2Institut des NanoSciences de Paris, Sorbonne Universités, UPMC Univ Paris, France
Circular dichroism spectroscopy is one of the conventional approaches to detect chiral molecules. Recent studies have shown high prospects for pseudo-chiral and achiral nano-resonators of plasmonic and high refractive index dielectric materials in enhancing chiral sensitivity. Here we study the far-field circular dichroism for U-shaped and nano-pillar resonators of silicon and gold by calculating Mueller matrix elements with the Finite element method.