Biexciton Two‐Photon Absorption and Raman Scattering in CuBr
A. I. Bobrysheva, V. V. Baltaga, M. V. Grodetskii
Abstract The probabilities of the two‐photon absorption by a biexciton in the ground and the first vibrational states in CuBr and the probability of the two‐photon Raman scattering with the participation of the ground and the first vibrational states of the biexciton as intermediate states are calculated by perturbation theory method. Supposing that a Lorentzian distribution of frequencies ωi of the exciting light and a Lorentzian shape of the emission lines of the excition occur, the shape of the emission line at different values of the biexciton half‐width Γm is calculated. The dependence of the Raman scattering maximum position on ωi is obtained. At the condition 2Γ ≧ Γm; Γ Γm ≦ Γf the experimentally observed deviation of the Raman scattering maximum shifting from 2Δωi, is explained. The polarizational properties of the Raman scattering probability are obtained including the case when the intermediate states are the biexcitons Γ1, Γ5, Γ3.
physica status solidi (b)•May 1, 1984•1 citation