Theory of optical nonlinearities of coupled-band quantum wells with many-body effects
Book
·
OSTI ID:64754
- Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro (Brazil)
- Univ. of Arizona, Tucson, AZ (United States)
Nonlinear optical properties of lattice-matched and strained semiconductor quantum wells are computed using generalized optical Bloch equations. The equations combine the influence of many-body, strain and band coupling effects, within a consistent model for quasi-static screening that includes contributions from all occupied subbands in a single-plasmon-pole type approximation. Numerical solutions for the absorption and refractive index change of InGaAs-AlGaAs systems are presented in the quasi-equilibrium regime for a broad range of excitation conditions, from the low density excitonic regime to the highly excited gain region. Good agreement with recent experimental results is found.
- OSTI ID:
- 64754
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1441-7
- Country of Publication:
- United States
- Language:
- English
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