Non-circular semiconductor nanorings of type I and II: Emission kinetics in the exciton Aharonov-Bohm effect

Abstract

Transition energies and oscillator strengths of excitons in dependence on magnetic field are investigated in type I and II semiconductor nanorings. A slight deviation from circular (concentric) shape of the type II nanoring gives a better observability of the Aharonov-Bohm oscillations since the ground state is always optically active. Kinetic equations for the exciton occupation are solved with acoustic phonon scattering as the major relaxation process, and absorption and luminescence spectra are calculated showing deviations from equilibrium. The presence of a non-radiative exciton decay leads to a quenching of the integrated photoluminescence with magnetic field.

The first version submitted to Phys. Rev. B on April 16, 2007. Revised (this) version on July 31, 2007

References in corpus (4)

• Flux qubit on mesoscopic nonsuperconducting ring
• Dynamical T-matrix theory for high-density excitons in coupled quantum wells
• Aharonov-Bohm effect for an exciton in a finite width nano-ring
• Electron-Phonon Interaction in Embedded Semiconductor Nanostructures

Cited by in corpus (4)

• Exciton storage in a nano-scale Aharonov-Bohm ring with electric field tuning
• Few-electron artificial molecules formed by laterally coupled quantum rings
• Microcavity polaritons in disordered exciton lattices
• Disorder and Interactions in Graphene and other Quantum Systems