Resonance Raman scattering from a multilevel, thermally relaxing system

摘要: We consider light scattering from a multilevel system (e.g., molecule) interacting with several heat baths. The Liouville space approach is employed and weak incident radiation intensity assumed, whereas the process described in lowest appropriate order interaction between molecule emitted photons. other field modes as well thermal baths treated more fully, such to account for correct damping terms their temperature dependence. formalism suited an impurity both gas dense phases. induce relaxation within manifold of excited states transitions nonradiative channels. Damping due (as radiative damping) corresponds interactions zero physical interpretation bath depends on nature particular process. Thermal induced by environment represented T. Part this which diagonal molecular so‐called ’’quasielastic collisions’’ induces modulations energy levels broadening relaxed emission. remainder, nondiagonal part actual levels. yields single calculation expressions cross section coherent (Raman) luminescence enables us discuss effects different factors quenching processes relative these processes. also allows interference coupling same bath, makes it possible study effect phenomena.