Microscopic theory of optical dephasing in semiconductors |
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Authors: | S.W. Koch T. Meier F. Jahnke P. Thomas |
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Affiliation: | (1) Department of Physics and Material Sciences Center, Philipps University, Renthof 5, 35032 Marburg, Germany, DE |
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Abstract: | Dephasing, i.e. the decay of the optical interband polarization in a semiconductor results from destructive interference effects between different microscopic contributions. For a system without any disorder it is shown that the many-body Coulomb correlations lead to excitation-induced dephasing which becomes increasingly important at elevated excitation levels. The effect of disorder-induced dephasing is analyzed for low excitation levels, where the combined influence of excitonic, biexcitonic, and disorder scattering contributions lead to a temporal decay of the four-wave-mixing signal. Received: 30 March 2000 / Accepted: 2 September 2000 / Published online: 12 October 2000 |
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Keywords: | PACS: 71.35.Cc 42.50.Md 78.66.-w |
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