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- W1577029295 abstract "Summary form only given. The absorption and gain of electromagnetic radiation by electronic transitions over the fundamental gap as a function of carrier density, wavelength, polarization of radiation, and strain has been well characterized. In contrast, the influence of these parameters on the absorption by intervalence band transitions (IVBA) has been investigated less thoroughly. Such transitions occur at higher values of the crystal momentum, where the interaction of the valence bands with the conduction band is nonnegligible. Consequently, at least an 8-band k/spl middot/p model is required including the lowest conduction (C), heavy hole (HH), light hole (LH), split-off (SO) band, and spin, to allow optical matrix elements to be consistently calculated according to actual symmetries of wave functions. In this paper, we present a theoretical calculation of both IVBA and gain, to elucidate their relationship, the role of the different bands involved and the magnitude of strain-induced optical anisotropies. We demonstrate that IVBA has a strong influence on the laser threshold of such materials." @default.
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- W1577029295 date "1996-06-07" @default.
- W1577029295 modified "2023-09-23" @default.
- W1577029295 title "Competition of intervalence band absorption and interband gain in strained tetrahedral semiconductors" @default.
- W1577029295 hasPublicationYear "1996" @default.
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