Abstract
AbstractExciton reflection spectra under high‐intensity excitation by a nitrogen laser are studied in CdS and CdSe at 4.2 K. With increasing excitation density, the reflection peak intensity decreases, simultaneously the spectral width becoming broader, and finally the reflection structure becomes very obscure. Shapes of observed spectra are analyzed in terms of the classical oscillator model using a phenomenological damping term. From the comparison of the results of the analysis with luminescence spectra simultaneously measured, it is concluded that the obscurity of the reflection structure is caused by the shortening of the transverse relaxation time of excitons due to the inelastic collision of excitons.
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