Exciton absorption and optical-gain bands in the presence of laser radiation

被引：0
|
作者：
S. A. Moskalenko
V. G. Pavlov
V. R. Mis’ko
机构：
[1] Moldovan Academy of Sciences,Institute of Applied Physics
来源：
Physics of the Solid State | 1998年 / 40卷
关键词：
Radiation; Spectroscopy; State Physics; Laser Radiation; Probe Signal;
D O I：
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中图分类号：
学科分类号：
摘要：
The absorption and gain bands of a weak probe signal in the presence of the Bose-Einstein condensation of excitons, which appears under nonequilibrium conditions in a field of coherent laser radiation, are considered. It is shown that the absorption of light is caused by a quantum transition from the ground state of the crystal to the quasiexciton branch of the spectrum. Amplification of the signal occurs as a result of transitions from the quasiexciton branch of the spectrum to the ground state of the crystal.
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页码：850 / 852
页数：2
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