Dark-bright mixing of interband transitions in symmetric semiconductor quantum dots
Mesoscale and Nanoscale Physics
2015-05-28 v1
Abstract
In photoluminescence spectra of symmetric [111] grown GaAs/AlGaAs quantum dots in longitudinal magnetic fields applied along the growth axis we observe in addition to the expected bright states also nominally dark transitions for both charged and neutral excitons. We uncover a strongly non-monotonous, sign changing field dependence of the bright neutral exciton splitting resulting from the interplay between exchange and Zeeman effects. Our theory shows quantitatively that these surprising experimental results are due to magnetic-field-induced \pm 3/2 heavy-hole mixing, an inherent property of systems with C_3v point-group symmetry.
Keywords
Cite
@article{arxiv.1106.6182,
title = {Dark-bright mixing of interband transitions in symmetric semiconductor quantum dots},
author = {G. Sallen and B. Urbaszek and M. M. Glazov and E. L. Ivchenko and T. Kuroda and T. Mano and S. Kunz and M. Abbarchi and K. Sakoda and D. Lagarde and A. Balocchi and X. Marie and T. Amand},
journal= {arXiv preprint arXiv:1106.6182},
year = {2015}
}
Comments
5 pages, 3 figures