Strain dependence of hole mass and optical anisotropy in (110) quantum wells
Journal
Journal of Applied Physics
Journal Volume
82
Journal Issue
11
Pages
5711-5717
Date Issued
1997
Author(s)
Abstract
We have investigated the effects of strain and confinement on the biaxial properties of hole masses and optical transitions in strained (110) quantum wells. Based on a theory of k��p perturbation and deformation potential, we present an analytical method to treat the band mixing effects. We have found it crucial to incorporate the spin-orbital coupling effect in order to quantify the band structure anisotropy. Our calculations indicate the use of strain and confinement can lead to considerable changes in the biaxial properties of a (110) quantum well. In a compressively strained quantum well, the in-plane effective masses of heavy and light holes are shown to have a light component along [1?10] and [001], respectively. In addition, the optical interband transitions are found to exhibit similar anisotropy as those of the hole masses. In a tensile strained quantum well, however, the in-plane anisotropy of hole masses and optical transitions are found to undergo a character change after passing the anticrossing condition.
Type
journal article