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: 27th June 2022, 07:41:00 CEST
TOM9 S01: Optics at Nanoscale (ONS): Metastructures
10:15 - 11:45
Session Chair: Vito Mocella, CNR, Italy
Location:Aula 8 1st Floor
10:15 - 10:45 Invited ID: 161 / TOM9 S01: 1 TOM 9 Optics at Nanoscale (ONS)
On the generalized Snell-Descartes laws for metasurfaces
Emmanuel Rousseau, Didier Felbacq
Laboratoire Charles Coulomb - University of Montpellier - CNRS, France
This presentation is about the generalized laws of reflection and refraction for metasurfaces. We discuss in detail their derivation starting from questioning the original proof. We discuss two families of metasurfaces, namely refractive metasurfaces, made of a refractive layer with position-dependent optical index and diffractive metasurfaces made of scatterers. We conclude that some generalized Snell-Descartes laws can be defined but they differ from the ones reported in the literature.
10:45 - 11:15 Invited ID: 438 / TOM9 S01: 2 TOM 9 Optics at Nanoscale (ONS)
Dielectric metasurfaces for emission efficiency control at telecom wavelengths
Boris Kalinic1, Tiziana Cesca1, Ionut Balasa1, Concita Sibilia2, Giovanni Mattei1
1University of Padova, Italy; 2Sapienza University of Rome, Italy
Recently, a huge effort has been directed to engineering the radiative properties of an emitter to obtain increasingly efficient photonic sources in the telecom wavelength range.
We investigate the modification of the room temperature luminescence (radiative decay rate and intensity) at λ = 1540 nm from Er3+ ions coupled to different metasurfaces, like Si-based arrays of disk nanoslots or nanostructured phase-change materials (VO2). These exhibit a rich set of high Q-factors modes, which can be effectively coupled to the mixed electric dipole (ED) and magnetic dipole (MD) transitions of Er3+
11:15 - 11:45 Invited ID: 288 / TOM9 S01: 3 TOM 9 Optics at Nanoscale (ONS)
Optical properties of porous silicon nanowires at high pressures
Javad Rezvani1,2, Yimin Mijiti1, Andrea Di Cicco1
1Physics Division, School of Science and Technology, University of Camerino, 62032 Camerino (Italy); 2Advanced Materials Metrology and Life Science Division, INRiM (Istituto Nazionale di Ricerca Metrologica), Strada delle Cacce 91, Torino, Italy.
Optical properties of porous silicon nanowires (NWs) with homogenous lateral dimensions of 90 nm are investigated by Raman scattering experiments along isothermal pressure cycles in a diamond anvil cell. Experiments were performed at variable temperatures up to 400°C and pressures of 30 GPa comparing the bulk Si and porous NWs. Our results evidence that the phase properties are significantly affected by the initial structure, size and shape distribution of the materials especially at low dimension. The exotic phase transitions with distinct properties in Si NWs lead to advanced future applications.