Polarization Properties of Columnar Quantum Dots: Effects of Aspect Ratio and Compositional Contrast

Ridha, Philipp, Li, Lianhe H., Mexis, Meletios, Smowton, Peter Michael ORCID: https://orcid.org/0000-0002-9105-4842, Andrzejewski, Janusz, Sek, Grzegorz, Misiewicz, Jan, O'Reilly, Eion P., Patriarche, Gilles and Fiore, Andrea 2010. Polarization Properties of Columnar Quantum Dots: Effects of Aspect Ratio and Compositional Contrast. IEEE Journal of Quantum Electronics 46 (2) , pp. 197-204. 10.1109/JQE.2009.2030339

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Abstract

We report a systematic theoretical and experimental investigation of the polarization properties of columnar quantum dots (CQDs) with extremely large aspect ratio and high compositional contrast. A strong variation of the polarization of the dominant interband transitions as a function of the CQD composition and aspect ratio is predicted by the theory and observed experimentally. In optimized InAs CQDs grown on GaAs, dominant emission and lasing is obtained in the transverse-magnetic polarization, which shows the potential of this approach for polarization-independent amplifiers on GaAs.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Uncontrolled Keywords:	Optical amplifiers ; Polarization ; Quantum dots ; Semiconductor lasers
Publisher:	IEEE Photonics Society
ISSN:	0018-9197
Last Modified:	17 Oct 2022 10:13
URI:	https://orca.cardiff.ac.uk/id/eprint/7354

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