Fluorescence relaxation in the near-field of a mesoscopic metallic particle: distance dependence and role of plasmon modes.

Date publication

octobre 2008

Auteurs

Membres identifiés du Cancéropôle Est :
Dr DUJARDIN Denis , Pr FINOT Eric , Pr WEEBER Jean-Claude

Tous les auteurs :
Colas des Francs G, Bouhelier A, Finot E, Weeber JC, Dereux A, Girard C, Dujardin E

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/18958046

Résumé

We analytically and numerically analyze the fluorescence decay rate of a quantum emitter placed in the vicinity of a spherical metallic particle of mesoscopic size (i.e with dimensions comparable to the emission wavelength). We discuss the efficiency of the radiative decay rate and non-radiative coupling to the particle as well as their distance dependence. The electromagnetic coupling mechanisms between the emitter and the particle are investigated by analyzing the role of the plasmon modes and their nature (dipole, multipole or interface mode). We demonstrate that near-field coupling can be expressed in a simple form verifying the optical theorem for each particle modes.

Référence

Opt Express. 2008 Oct 27;16(22):17654-66.