Many-body effects in the emission spectrum of ZnTe under high-intensity photoexcitation
- 15 April 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 19 (8), 4149-4153
- https://doi.org/10.1103/physrevb.19.4149
Abstract
At high photoexcitation levels the free-exciton emission band in ZnTe is characterized by a strong distortion which increases with the excitation intensity. The two main features are a peak shift towards lower energies and a broadening of the low-energy side of the emission band. These effects have been studied as a function of the pump wavelength by using a high-intensity tunable dye laser. The emission-peak shift is interpreted in terms of band-gap shrinkage and electron-phonon interaction. The broadening is attributed to the nonequilibrium distribution of LO phonons (hot phonons) and electrons (hot electrons).Keywords
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