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Optical anisotropy of InAs/GaSb broken-gap quantum wells

Zakharova, A. A.; Semenikhin, I. A. and Chao, Koung-An LU (2012) In Journal of Experimental and Theoretical Physics 114(5). p.731-737
Abstract
We investigate in detail the optical anisotropy of absorption of linearly polarized light in InAs/GaSb quantum wells grown on GaSb along the [001] direction, which can be used as an active region of different laser structures. The energy level positions, the wave functions, the optical matrix elements, and the absorption coefficients are calculated using the eight-band k center dot p model and the Burt-Foreman envelope function theory. In these calculations, the Schrodinger and Poisson equations are solved self-consistently taking the lattice-mismatched strain into account. We find that a realistic Hamiltonian, which has the C (2v) symmetry, results in considerable anisotropy of optical matrix elements for different directions of light... (More)
We investigate in detail the optical anisotropy of absorption of linearly polarized light in InAs/GaSb quantum wells grown on GaSb along the [001] direction, which can be used as an active region of different laser structures. The energy level positions, the wave functions, the optical matrix elements, and the absorption coefficients are calculated using the eight-band k center dot p model and the Burt-Foreman envelope function theory. In these calculations, the Schrodinger and Poisson equations are solved self-consistently taking the lattice-mismatched strain into account. We find that a realistic Hamiltonian, which has the C (2v) symmetry, results in considerable anisotropy of optical matrix elements for different directions of light polarization and different directions of the initial-state in-plane wave vector, including low-symmetry directions. We trace how the optical matrix elements and absorption are modified when spin-orbit interaction and important symmetry breaking mechanisms are taken into account (structural inversion asymmetry, bulk inversion asymmetry, and interface Hamiltonian). These mechanisms result in an almost 100% anisotropy of the absorption coefficients as the light polarization vector rotates in the plane of the structure and in a plane normal to the interfaces. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Experimental and Theoretical Physics
volume
114
issue
5
pages
731 - 737
publisher
MAIK Nauka/Interperiodica
external identifiers
  • wos:000305231900004
  • scopus:84863708083
ISSN
1063-7761
DOI
10.1134/S1063776112030090
language
English
LU publication?
yes
id
c27fe3bb-c027-46ff-98ae-7de9835015d4 (old id 2895647)
date added to LUP
2012-07-26 10:47:02
date last changed
2017-01-01 03:43:37
@article{c27fe3bb-c027-46ff-98ae-7de9835015d4,
  abstract     = {We investigate in detail the optical anisotropy of absorption of linearly polarized light in InAs/GaSb quantum wells grown on GaSb along the [001] direction, which can be used as an active region of different laser structures. The energy level positions, the wave functions, the optical matrix elements, and the absorption coefficients are calculated using the eight-band k center dot p model and the Burt-Foreman envelope function theory. In these calculations, the Schrodinger and Poisson equations are solved self-consistently taking the lattice-mismatched strain into account. We find that a realistic Hamiltonian, which has the C (2v) symmetry, results in considerable anisotropy of optical matrix elements for different directions of light polarization and different directions of the initial-state in-plane wave vector, including low-symmetry directions. We trace how the optical matrix elements and absorption are modified when spin-orbit interaction and important symmetry breaking mechanisms are taken into account (structural inversion asymmetry, bulk inversion asymmetry, and interface Hamiltonian). These mechanisms result in an almost 100% anisotropy of the absorption coefficients as the light polarization vector rotates in the plane of the structure and in a plane normal to the interfaces.},
  author       = {Zakharova, A. A. and Semenikhin, I. A. and Chao, Koung-An},
  issn         = {1063-7761},
  language     = {eng},
  number       = {5},
  pages        = {731--737},
  publisher    = {MAIK Nauka/Interperiodica},
  series       = {Journal of Experimental and Theoretical Physics},
  title        = {Optical anisotropy of InAs/GaSb broken-gap quantum wells},
  url          = {http://dx.doi.org/10.1134/S1063776112030090},
  volume       = {114},
  year         = {2012},
}