Strain-induced In-Plane Optical Anisotropy in (001) GaAs∕AlGaAs Superlattice Studied by Reflectance Difference Spectroscopy

In-plane optical anisotropy (IPOA) in (001) GaAs∕AlGaAs superlattice induced by uniaxial strain has been investigated by reflectance difference spectroscopy (RDS). Uniaxial strain on the order of 10−4 was introduced by bending a strip sample with a stress apparatus. The IPOA of all interband transitions shows a linear dependence on strain. The birefringence and dichroism spectra induced by strain are obtained by RDS on the basis of a three-phase model, which is in good agreement with the reported results.