Polariton Effects in the Optical Spectra of Excitonic Molecules

Abstract

Abstract Starting from a model Hamiltonian which describes an excitonic molecule‐excitonphoton system at not too high electron‐hole pair densities, an excitonic molecule‐polariton interaction is derived. By means of this interaction the influence of polariton effects on the optical emission, absorption, and scattering processes involving excitonic molecules is studied theoretically. It is shown, that the transition probabilities of these processes are diminished due to polariton effects, especially in substances with small molecule binding energies. Furthermore, some characteristic modifications of the optical spectra (additional lines, changes in the line positions and shapes) are reported.