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The role of spatial dispersion in a quadrupole light absorption
Author(s) -
Davydov A. S.,
Eremko A. A.
Publication year - 1973
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.2220590123
Subject(s) - quadrupole , exciton , crystal (programming language) , dispersion (optics) , absorption (acoustics) , physics , attenuation coefficient , atomic physics , spatial dispersion , condensed matter physics , optics , molecular physics , computer science , programming language
The phenomenological Maxwell equations are used to investigate the passage of light through a crystal in a frequency range that corresponds to an isolated band of exciton states of the quadrupole type. The conditions are found under which the singularities connected with the wave‐vector dependence of the exciton frequency and an oscillating dependence of the light transmission coefficient on the crystal width may occur (when the width is small). The calculated results are compared with the Gorban‐Timofeev experiment with Cu 2 O in the quadrupole exciton absorption region when λ = 6125 Å.