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Additional waves and Fabry‐Perot interference of photoexcitons (polaritons) in thin II–VI crystals
Author(s) -
Kiselev V. A.,
Razbirin B. S.,
Uraltsev I. N.
Publication year - 1975
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.2220720117
Subject(s) - polariton , exciton , interference (communication) , fabry–pérot interferometer , optics , reflectivity , spectral line , dispersion (optics) , spatial dispersion , thin film , materials science , molecular physics , condensed matter physics , physics , wavelength , quantum mechanics , telecommunications , channel (broadcasting) , computer science
Within the frame work of Pekar's model for a spatially dispersive, bounded medium, optical spectra of thin crystals, reported by us recently, are analyzed, showing a structure due to the interference of additional waves and the Fabry‐Perot structure deviating markedly from the one expected in the classical case in the neighbourhood of exciton resonances. A comparison of the experimental reflectivity with that obtained numerically provides values for all physical parameters defining dispersion and damping of the photoexcitons. Some additional experimental results for excitons in thin crystals are reported: evidence for the induced surface wave, an effect of the forbidden exciton, etc.