Excitons in quantum-ring structures in a magnetic field: Optical properties and persistent currents

Abstract

We study theoretically the magnetic field effect on a neutral, but polarizable exciton confined in quantum-ring structures. For excitons with a nonzero dipole moment, a novel magnetic interference effect occurs: The ground state of an exciton confined in a finite-width quantum ring possesses a nonzero angular momentum with increasing normal magnetic field. This effect is accompanied by a suppression of the photoluminescence in well-defined magnetic-field intervals. The magnetic interference effect is calculated for type-II quantum dots and quantum rings.

10 pages, 2 figures, Proceed. MSS-10, 2001 (Physica E)

References in corpus (1)

• Optical excitations of a self assembled artificial ion

Cited by in corpus (8)

• Aharonov-Bohm signature for neutral excitons in type-II quantum dot ensembles
• Impurity-enhanced Aharonov-Bohm effect in neutral quantum-ring magnetoexcitons
• Tunable optical Aharonov-Bohm effect in a semiconductor quantum ring
• Excitonic Aharonov-Bohm effect in a two-dimensional quantum ring
• Single and vertically coupled type II quantum dots in a perpendicular magnetic field: exciton groundstate properties
• Polarization and Aharonov-Bohm oscillations in quantum-ring magnetoexcitons
• Finite Size Effects on the Optical Transitions in Quantum Rings under a Magnetic Field
• Impurity center in a semiconductor quantum ring in the presence of a radial electric field