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Title:Electronic and Optical Properties of Self-Assembled Quantum Wires
Author(s):Li, Liang-Xin
Doctoral Committee Chair(s):Chang, Yia-Chung
Department / Program:Physics
Subject(s):quantum-wires (QWR)
effective bond-orbital model (EBOM)
Abstract:We have studied the band and optical properties of self-assembled quantum wires. In particular, the band structures and optical matrix elements of strained multiple quantumwires (QWR's) are investigated theoretically via the effective bond-orbital model(EBOM), which takes into account the effects of valence-band anisotropy and the band mixing. It is found that the strain leads to further confinement of carriers and enhancement of the anisotropy. By using the EBOM and valence-force field model, we systematically studied the microstrain effects on the electronic and optical properties of Ga(1-x)In(x)As self-assembled quantumwires (QWR's) made of short-period superlattices with strain-induced lateral ordering. Valenceband anisotropy, band mixing, and effects due to local strain distribution at the atomistic level are all taken into account. A comprehensive collection of different structures in our model are presented. Finally, the excitonic absorption spectrum for the SILO quantum wires are investigated by using our envelope function model.
Issue Date:2001
Genre:Dissertation / Thesis
Other Identifier(s):4423492
Rights Information:©2001 Li
Date Available in IDEALS:2012-05-31

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