Birefringence and absorption of light during intersubband transitions of hot electrons in quantum wells |
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| Authors: | L. E. Vorob’ev D. A. Firsov V. A. Shalygin I. I. Saidashev |
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| Affiliation: | (1) St. Petersburg State Technical University, 195251 St. Petersburg, Russia;(2) A. F. Ioffe Physicotechnical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia |
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| Abstract: | The changes in the birefringence and absorption of infrared radiation accompanying direct electron transitions induced between size-quantization subbands in a GaAs/AlGaAs system of doped quantum wells by heating of the electrons by an electric field applied parallel to the layers of the heterostructure are observed and investigated. An explanation of the observed effects is offered whereing the change in the absorption spectrum and the contribution of free electrons to the permittivity are related to the exchange interaction and nonparabolicity of the energy spectrum of the hot electrons. Pis’ma Zh. éksp. Teor. Fiz. 65, No. 7, 525–530 (10 April 1997) |
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