Polarization Effects of Resonance Raman Scattering in a Linearly-Coupled Localized-Electron Phonon System

Abstract

A study is made of the resonance Raman scattering in a linearly-coupled localized-electron phonon system with doubly degenerate excited level. For an arbitrary coupling strength, the degree of polarization and the secondary radiation intensity are calculated as a function of the incident and scattered photon energies. The polarization relaxation mechanism, as well as the energy relaxation mechanism, during the resonant second-order optical process is clarified. It is found that in the closely resonant case, not only the Raman lines but also the luminescence lines are highly polarized. This phenomenon reflects the distinctive feature inherent in the linear interaction system.