Eur. Phys. J. B 53, 99-108 (2006)
https://doi.org/10.1140/epjb/e2006-00351-2

Finite size effects on the optical transitions in quantum rings under a magnetic field

Material Science Institute, Universitat de València, PO Box 22085, 46071 Valencia, Spain

Corresponding author: ^a Tatyana.Bandos@uv.es

Received: 23 May 2006
Revised: 29 July 2006
Published online: 22 September 2006

Abstract

We present a theoretical study of the energy spectrum of single electron and hole states in quantum dots of annular geometry under a high magnetic field along the ring axis in the frame of uncorrelated electron-hole theory. We predict the periodic disappearance of the optical emission of the electron-hole pair as the magnetic field increases, as a consequence of the finite height of the barriers. The model has been applied to semiconductor rings of various internal and external radii, giving as limiting cases the disk and antidot.