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Two‐Photon Absorption by Envelope–Hole Coupled Exciton States in Cubic ZnSe. II. Polarization Dependence in the Case of Degenerate Valence Bands
Author(s) -
Sondergeld M.
Publication year - 1977
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.2220810205
Subject(s) - exciton , degenerate energy levels , hamiltonian (control theory) , polarization (electrochemistry) , physics , atomic physics , valence (chemistry) , photon , condensed matter physics , biexciton , scattering , molecular physics , chemistry , quantum mechanics , mathematical optimization , mathematics
The general angular dependence of two‐photon absorption for elliptical polarization is given in terms of complex polarization vectors in the case of cubic and spherical symmetry. The two‐photon transition probability for p‐like envelope–hole coupled exciton states is treated within an extended two‐band model which, for the case of degenerate valence bands, includes H d ‐term contributions of the exciton Hamiltonian. By use of the effective Bohr radii, resulting from the envelope–hole coupled exciton wave functions, the experimental polarization ratios yield good quantitative agreement with the values predicted theoretically.