Optical anisotropy of (113)-oriented GaAs/AlAs superlattices
- 15 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 49 (19) , 14020-14023
- https://doi.org/10.1103/physrevb.49.14020
Abstract
The optical properties of (113)-oriented GaAs/AlAs superlattices grown by atomic-layer molecular-beam epitaxy at low substrate temperature have been studied by means of piezoreflectance techniques. Several transitions have been detected which exhibit heavy-hole and light-hole character. The heavy-hole transitions are more polarized along the [33¯2] direction whereas the light-hole transitions are more polarized along the [1¯10] direction. We have also performed calculations for these superlattices by using an empirical tight-binding Hamiltonian. According to the results thus obtained the observed optical anisotropy is related to the different components of the valence-band wave functions of the superlattices.Keywords
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