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