Volume 83, Number 6, September 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||08 September 2008|
Giant optical anisotropy in cylindrical self-assembled InAs/GaAs quantum rings
Key Laboratory of Quantum Information, University of Science and Technology of China, CAS Hefei, 230026, PRC
Corresponding author: email@example.com
Accepted: 24 July 2008
Using a single-particle atomistic pseudopotential method followed by a configuration interaction treatment to many-particle interactions, we investigate the geometry, electronic structures and optical transitions of a self-assembled InAsGaAs quantum ring (QR), with its shape changing continuously from a lens-shaped quantum dot (QD) to a nearly one-dimensional ring. We find that the biaxial strain inside the ring is strongly asymmetric in the plane perpendicular to the QR growth direction, leading to a giant optical anisotropy.
PACS: 73.21.La – Quantum dots / 73.22.-f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 71.35.-y – Excitons and related phenomena
© EPLA, 2008
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