| Issue |
EPL
Volume 83, Number 6, September 2008
|
|
|---|---|---|
| Article Number | 67004 | |
| Number of page(s) | 5 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/83/67004 | |
| 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: helx@ustc.edu.cn
Received:
13
May
2008
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 InAs
GaAs
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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