Self-assembled Semiconductor Quantum Ring Complexes by Droplet Epitaxy: Growth and Physical Properties

Abstract

Extremely complex semiconductor quantum ring based structures, as single ring, multiple concentric quantum rings and coupled ring-disk, dot-ring and dot-disk structures, can be easily designed and grown by Droplet Epitaxy. In this paper, the fabrication and the characterization of such complex quantum nanostructures are reviewed. Electronic structure, single photon emission, carrier dynamics and magnetic properties in ring structures will be discussed.