Carrier-carrier relaxation kinetics in quantum well semiconductor structures with nonparabolic energy bands

H. Dery, Bjarne Tromborg, G. Eisenstein

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Abstract

We describe carrier-carrier scattering dynamics in an inverted quantum well structure including the nonparabolic nature of the valance band. A solution of the semiconductor Bloch equations yields strong evidence to a large change in the temporal evolution of the carrier distributions compared to the case of parabolic bands. The nonparabolic bands and the consequent change in the density of states reduce considerably the degree of gain saturation while decreasing the time constant governing the relaxation. This results in a measurable reduction of the role played by carrier-carrier scattering in determining the gain nonlinearity and hence the modulation and switching speed of lasers and optical amplifiers.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume68
Issue number16
Pages (from-to)165323
ISSN0163-1829
DOIs
Publication statusPublished - 2003

Bibliographical note

Copyright (2003) American Physical Society.

Keywords

  • SCATTERING
  • EQUATIONS

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