Premium
Temperature Dependence of Exciton Linewidth in CsI and CsBr
Author(s) -
Beerwerth F.,
Fröhlich D.,
Leinweber V.
Publication year - 1988
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.2221450117
Subject(s) - laser linewidth , exciton , biexciton , phonon , spectroscopy , halide , photon , atomic physics , condensed matter physics , chemistry , materials science , physics , optics , quantum mechanics , laser , inorganic chemistry
The temperature dependence of the linewidth of the lowest two Γ 4 −excitons in CsI and in CsBr and of a very narrow Γ 5 −exciton in CsI is reported. All spectra are measured by three‐photon spectroscopy. The analysis of the experimental results allows conclusions about the decay mechanism of excitons in alkali halides. The temperature dependent broadening is quantitatively described by taking into account exciton—phonon interaction.