Excitation Spectrum of Arsenic Impurity in Germanium under Uniaxial Compression

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Abstract
The effect of uniaxial stress on the excitation spectrum of arsenic impurity in germanium has been studied for compression along the simple directions [111], [110], and [100] using polarized light. The results can be understood in the framework of the effective-mass theory of Kohn and Luttinger and the deformation-potential theory. Selection rules for the observed transitions have been deduced from symmetry arguments. However, actual calculations of relative intensities of transitions are also given. Qualitative comparison of the latter with the observations gives good agreement.