Spatial Dispersion Effects in Resonant Polariton Scattering. II. Resonant Brillouin Scattering

Abstract

Inelastic scattering of light near an exciton resonance is considered, using a polariton description of the scattering process. We obtain the following results: for incident frequency approaching the resonance from below, the Brillouin shift increases; very near and above resonance, extra lines are predicted with intensities comparable to the usual lines. They form an octet instead of the familiar Brillouin doublet. Numerical calculations of the Brillouin scattering for CdS are given: The shifts and extra lines seem to be observable.