University of Illinois Urbana-Champaign

Electronic and Optical Properties of Self-Assembled Quantum Wires

Li, Liang-Xin

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https://hdl.handle.net/2142/31316

Description

Title
Electronic and Optical Properties of Self-Assembled Quantum Wires
Author(s)
Li, Liang-Xin
Issue Date
2001
Doctoral Committee Chair(s)
Chang, Yia-Chung
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • quantum-wires (QWR)
  • effective bond-orbital model (EBOM)
Language
en
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.
Type of Resource
text
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http://hdl.handle.net/2142/31316
Copyright and License Information
©2001 Li

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