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Proceedings Paper

Theoretical study of optical properties of strained-layer heterostructures
Author(s): Tow Chong Chong
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Paper Abstract

In this presentation, the valence band mixing effect in strained quantum well structures based on the multiband effective mass theory is first presented. By using the envelope function approximation and the direct variation method, the valence band structures of some strained III-V semiconductor quantum well systems which are of interest to photonic applications are discussed. With the knowledge of the electronic wave functions and the energy band structures, optical gain behaviors of the strained quantum well systems are analyzed using the density matrix theory. The polarization dependence of the optical gain in strained layers is discussed in association with the dipole moment between the conduction band and the valence band. It is shown that biaxial compressive strain can reduce the asymmetry between conduction band and heavy-hole band masses, thus resulting in the reduction of laser threshold current as well as losses due to Auger recombination in semiconductor lasers.

Paper Details

Date Published: 11 May 1993
PDF: 1 pages
Proc. SPIE 1979, 1992 International Conference on Lasers and Optoelectronics, (11 May 1993); doi: 10.1117/12.144146
Show Author Affiliations
Tow Chong Chong, National Univ. of Singapore (Singapore)

Published in SPIE Proceedings Vol. 1979:
1992 International Conference on Lasers and Optoelectronics
Sui-Sheng Mei; Bingkun Zhou, Editor(s)

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