We study analytically the optical properties of a simple model for an electron-hole pair on a ring subjected to perpendicular magnetic flux and in-plane electric field. We show how to tune this excitonic system from optically active to optically dark as a function of these external fields. Our results offer a simple mechanism for exciton storage and read-out.
@article{arxiv.0809.3863,
title = {Exciton storage in a nano-scale Aharonov-Bohm ring with electric field tuning},
author = {Andrea M. Fischer and Vivaldo L. Campo and Mikhail E. Portnoi and Rudolf A. Roemer},
journal= {arXiv preprint arXiv:0809.3863},
year = {2009}
}