Abstract

The k-space extension, \ensuremath{\Delta}k, of the heavy-hole wave function in GaAs is determined utilizing the photomodulation technique. In this technique, optical transitions between the usually full split-off and heavy-hole bands, are induced by continuously photogenerating electron-hole pairs. The observed absorption profile fits well a model that assumes that the heavy hole is weakly localized by charged centers. The localization length corresponding to \ensuremath{\Delta}${\mathit{k}}^{\mathrm{\ensuremath{-}}1}$ is 18 \AA{}.

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