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

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

2008-05-14

arxiv.org/abs/0805.1962v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1209/0295-5075/83/67004

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.

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