Electronic and Optical Properties of Self-Assembled Quantum Wires

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2012

Author dc:creator

• Li, Liang-Xin

Contributors dc:contributor

• Chang, Yia-Chung

• quantum-wires (QWR)
• effective bond-orbital model (EBOM)

Statement dc:rights

• ©2001 Li

Language dc:language

en

Identifier

4423492

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/31316