Séminaires du LRN

Publié le 14 février 2020

Le prochain séminaire du LRN sera présenté par Alina Muravitskaya, post-doctorante du Laboratoire de Recherches en Nanosciences et est intitulé " Ordered and disordered metal-dielectric nanostructures for Raman scattering and fluorescence enhancement ".

Le séminaire aura lieu Vendredi 14 février à 11h00 à l’UFR SEN en salle 1720.

Ces séminaires sont ouverts à toutes et à tous (étudiants, enseignants, chercheurs et curieux).

Venez nombreux !

Résumé :

Nanoplasmonics is the area at the intersection of science and technology in which the interaction of light with plasmonic nanoparticles is mediated by surface electromagnetic excitations at a dielectric-metal interface. The optical properties of plasmonic nanoparticles arrays differ significantly from those of isolated nanoparticles, due to the appearance of lattice resonances resulting from the diffraction mediation of the radiative coupling between nanoparticles. We studied the interparticle interactions in ordered and disordered nanoparticles ensembles and the use of such nanostructures for the Raman scattering and fluorescence enhancement. In particular the non-resonant and resonant surface-enhanced Raman scattering of the ZnO nanocrystals was obtained with a use of the Au, Ag and Al nanoparticles. We discuss the formation of the parallel collective resonances in rectangular arrays and also study the plasmonic modes hybridization in the case of the near-field and far-field interactions interplay in the plasmonic arrays.