title: Exciton storage in a nanoscale Aharonov-Bohm ring with electric field tuning.
abstract: 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 readout.
authors.affiliation: Department of Physics and Centre for Scientific Computing, University of Warwick, Coventry, CV4 7AL, United Kingdom.
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Fischer
authors.forename: Vivaldo L
authors.initials: VL
authors.lastname: Campo
authors.forename: Mikhail E
authors.initials: ME
authors.lastname: Portnoi
authors.forename: Rudolf A
authors.initials: RA
authors.lastname: Römer