Physics – Condensed Matter – Materials Science
Scientific paper
2001-01-08
Physics
Condensed Matter
Materials Science
16 pages, 15 figures
Scientific paper
The theoretical studies of optical properties of Ga$_{1-x}$In$_x$As self-assembled quantum-wires (QWR's) made of short-period superlattices with strain-induced lateral ordering are presented. Valence-band anisotropy, band mixing, and effects due to local strain distribution at the atomistic level are all taken into account. Using realistic material parameters which are experimentally feasible, we perform simulations of the absorption spectra for both inter-subband and inter-band transitions (including the excitonic effect) of this material.It is shown that the self-assembled QWR's have favorable optical properties for application in infra-red detection with normal incidence. The wavelength of detection ranges from 10 $\mu m$ to 20 $\mu m$ with the length of QWR period varying from 140\AA to 300\AA.
Chang Yen-Chang
Li Liang-Xin
Sun Sophia
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