Nano-optics, linear and nonlinear Plasmonics

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Optical antennas Light absorption by metallic gratings Dielectric microspheres Plasmon-soliton

The field of plasmonics is built on the resonant interaction of light with the free electrons of a noble metal. The polarizability of the free electron cloud allows particles much smaller than the incoming wavelength to couple efficiently with incoming light. The first application of this wavelength-specific interaction dates back to the Roman Empire with the use of metal particles in coloured glass.

Light matter interaction can be drastically increased at a nanometer scale which sparked a keen interest from a very wide scientific community ranging from quantum electrodynamics to electrical engineering for the understanding of light/matter interactions and from solar energy to pharmacology as potential applications.

The emblematic activity of our team concerns the famous problem of light absorption by metallic gratings. We also investigated the fundamental problem of light diffraction by a single subwavelength hole in a metallic film.

Our interest has been placed more recently on the general problem of light matter interaction enhanced at the nanometer scale by optical antennas. We also describe in this page our activities in the field of light focusing behind dielectric microspheres.

In the field of nonlinear plasmonics, we investigate the coupling between plasmons and spatial solitons that could propagate at the interface between a metal film and a nonlinear dielectrics.