Linear polarization in the emission spectra of multiexciton states in InAs/GaAs self-assembled quantum dots

Abstract

We present a theoretical study of the optical anisotropy in the emission spectra from multiexciton complexes in InAs/GaAs self-assembled quantum dots by empirical tight-binding and configuration-interaction approaches. The linear polarization in the multiexciton emission is calculated as a function of the aspect ratio of the structures. The results are compared with those obtained for non-interacting electron–hole pairs. The optical anisotropy in the emission spectra of multiexciton states is found to rely only on the geometry of the quantum dots, which is almost independent of carrier–carrier interactions.