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Biexciton Two‐Photon Absorption and Raman Scattering in CuBr
Author(s) -
Bobrysheva A. I.,
Baltaga V. V.,
Grodetskii M. V.
Publication year - 1984
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221230119
Subject(s) - biexciton , raman scattering , atomic physics , scattering , raman spectroscopy , exciton , x ray raman scattering , absorption (acoustics) , molecular physics , photon , physics , chemistry , optics , condensed matter physics
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 ω i 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 Γ m is calculated. The dependence of the Raman scattering maximum position on ω i is obtained. At the condition 2Γ ≧ Γ m ; Γ Γ m ≦ Γ f the experimentally observed deviation of the Raman scattering maximum shifting from 2Δω i , is explained. The polarizational properties of the Raman scattering probability are obtained including the case when the intermediate states are the biexcitons Γ 1 , Γ 5 , Γ 3 .