Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)


Accueil > La Recherche > Axes & Equipes > Physique de l’Exciton, du Photon & du Spin > Nanostructures quantiques, Propriétés Optique > Thème : Métamatériaux et Nanophotonique


par Sébastien LAYSSAC - publié le , mis à jour le

The research project in the field of nanophotonics concerns the study of Gradient Photonic Crystals, a concept initiated by our group in 2005. The main point is the design of lasers in planar GaAs photonic crystals in collaboration with the LAAS (Toulouse) and the LNIO (Troyes). These new devices make use of the dispersive properties of photonic crystals in which there is a gradient of the optical gain, making possible a new control of the laser effect. Besides this project, the study of gradient photonic crystals shall be continued in the Framework of a collaboration with the Institut d’Electronique Fondamentale in Orsay with the aim of realizing a gradient superprism for the multiplexing of wavelengths. This direction of research has a strong interdisciplinary flavor as we plan to use photonic crystals to realize biophotonic sensors, in collaboration with the group of C. Gergely. This internal collaboration aims at developing hybrid organic/inorganic devices making use of the non-linear properties of the bacteriorhodopsin

One of our main research activity is the theoretical and numerical modelisation of dielectric metamaterials. The future directions of research are the following :

  1. Metamaterials :
    We plan to extend our homogenization results to three dimensional objects and then to apply our results to the design and the optimisation of metamaterial-based devices in the framework of what is now called « transformation optics ».
  2. New subject :
    We have started a completely new activity by studying the hamiltonian and quantum chaos in periodic or random photonic crystals. The point is to study wave propagation in dielectric structures in the semi-classical regime, that is, when the wavelength is small compared to the scatterers. Photonic crystals have been heavily studied in the resonant regime or in the low-frequency limit. It is also interesting to study them for small wavelengths because it is a toy-model for quantum chaos and also because it could prove to be interesting for the study of random lasing.

Phase space behavior of the « photonic billiard ». Islands of stability (the « ellipsis » can be seen in the sea of chaos). © L2C