Giant optical anisotropy in cylindrical self-assembled InAs/GaAs quantum rings

Abstract

Using a single-particle atomistic pseudopotential method followed by a many-particle configuration interaction method, we investigate the geometry, electronic structure and optical transitions of a self-assembled InAs/GaAs quantum ring (QR), changing its shape continously from a lens-shaped quantum dot (QD) to a nearly one dimensional ring. We find that the biaxial strain in the ring is strongly asymmetric in the plane perpendicular to the QR growth direction, leading to giant optical anisotropy.

References in corpus (8)

• Spectroscopy of nanoscopic semiconductor rings
• Theoretical interpretation of the experimental electronic structure of lens shaped, self-assembled InAs/GaAs quantum dots
• Kondo effect in a few-electron quantum ring
• Formation of InAs Self-Assembled Quantum Rings on InP
• Magnetic field effects on quantum ring excitons
• Electronic structure of few-electron concentric double quantum rings
• Electronic phase diagrams of carriers in self-assembled InAs/GaAs quantum dots: violation of Hund's rule and the Aufbau principle for holes
• Multiple charging of InAs/GaAs quantum dots by electrons or holes: addition energies and ground-state configurations