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: 18th Aug 2022, 18:45:16 CEST
TOM9 S03: Optics at Nanoscale (ONS): Plasmonics II
16:15 - 17:45
Session Chair: Didier Felbacq, université de Montpellier, France
16:15 - 16:45 Invited ID: 485 / TOM9 S03: 1 TOM 9 Optics at Nanoscale (ONS)
Is practicle perfect optical transmission possible?
Loic Le Cunff1, Hind Kadiri1,2, Sambav Kumar1, Valentin Gaté3, Daniel Turover3, Gilles Lérondel1
1University of Technology of Troyes, France; 2Napa Technologies, France; 3SILSEF, France
In theory, subwavelength nanostructures should allow perfect transmission to be achieved thanks to refractive index matching. Moreover, the nanostructures could confer to the surface new functionalities such as anti-icing properties. We will in this presentation experimentally and theoretically the feasibility and intrinsic limitations of the approach. As an example, we will show how a silicon/air interface can transmit more light in the mid-IR than an air/glass interface in the visible while becoming super hydrophilic. As a perspective, the generalization of the approach to different kinds of material and spectral ranges will be discussed.
16:45 - 17:00 ID: 358 / TOM9 S03: 2 TOM 9 Optics at Nanoscale (ONS)
Circular dichroism and extraordinary transmission in metal films with elliptical nanohole arrays
Emilija Petronijevic1, Concita Sibilia1, Hanan Ali2, Giovanni Pellegrini2, Lucio C. Andreani2
1Sapienza University of Rome, Italy; 2University of Pavia, Italy
We theoretically study circular dichroism (CD) in hexagonal and square arrays of elliptical nanoholes etched in thin metallic layers on a glass substrate. CD resonances in transmission and in absorption spectra fall within extraordinary transmission (EOT) peaks from the holes and are associated with coupling to surface plasmon-polaritons at the interfaces with the metal. The conditions for maximizing the CD as a function of geometrical parameters are determined.
17:00 - 17:15 ID: 192 / TOM9 S03: 3 TOM 9 Optics at Nanoscale (ONS)
Numerical study of the optical properties of disordered metallic grooves by a one-mode analytical model
Denis Langevin1, Julien Jaeck1, Eslam El Shamy1, Riad Haïdar1,2, Patrick Bouchon1
1ONERA/DOTA, France; 2École polytechnique, France
Metallic grooves of sub-wavelength dimensions behave like Fabry-Perot nano-cavities able to resonantly enhance electromagnetic fields. In this paper, the consequences of positional disorder on the optical behavior of groove arrays are studied. We show, with a specifically developed simulation tool, that disorder leads to a redistribution of energy compared to the periodic case.
17:15 - 17:30 ID: 418 / TOM9 S03: 4 TOM 9 Optics at Nanoscale (ONS)
Optical properties of ultrathin Ag films: the role of porosity and morphology
Understanding the optical response-structure and morphology relation of ultrathin optical Ag films is crucial yet not properly addressed. We present new results obtained through a novel tool calculating the effective dielectric functions employing reflectance and transmission optical data. The film structure is modelled as a multi-layer system taking into account in particular the film porosity and roughness and the data are fitted with meaningful physical quantities (roughness, scattering time, porosity). We describe the dependence on film thickness and the major phisical parameters influence on the dielectric function.
17:30 - 17:45 ID: 310 / TOM9 S03: 5 TOM 9 Optics at Nanoscale (ONS)
Violation of the Einstein relations in single-mode nanolasers
Andrey A Vyshnevyy
MIPT, Russian Federation
Spontaneous and stimulated emission and the Einstein relations between them lie at the core of the laser theory. While the radiative processes in the cavities are considered to be well understood, we show that, even in the weak coupling limit, many-body effects arising from correlated dynamics of the laser cavity and the gain medium's electric polarization significantly affect emission rates, hence lead to the violation of the Einstein relations.