Fluorescence power of an atom near polarizable particles

Abstract

Abstract. We present a semi classical model for studying the fluorescent power radiated by an atom placed at the interstices between polarizable particles with dimensions at the nanometer scale irradiated by a laser with frequency close to resonance. The atom is represented by a twolevel quantum system and for the electromagnetic response of the surrounding particles a model based on their multipolar polarizability is used. Results are shown for the case of an atom in between two spherical particles forming a cluster, giving the fluorescent power of the atom as a function of the distance to the spheres and also of the laser frequency and intensity.