Modification of optical properties of GaAs-Ga1−<i>x</i>Al<i>x</i>As superlattices due to band mixing

Abstract

A theoretical calculation of the optical properties of GaAs-Ga1−xAlxAs superlattices is presented. The calculation includes the detailed atomic nature of the superlattice electronic states in a realistic tight-binding model. It is found that the mixture of the bulk heavy hole and light hole states in the superlattice wave function substantially affects the optical properties.