Pyramidal quantum dots: High uniformity and narrow excitonic emission
| Autor: | L. O. Mereni, Robert J. Young, Valeria Dimastrodonato, Emanuele Pelucchi |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Physics
business.industry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Condensed Matter::Materials Science Quantum dot laser Quantum dot Optoelectronics General Materials Science Metalorganic vapour phase epitaxy Emission spectrum Electrical and Electronic Engineering business Spectral purity |
| Zdroj: | Superlattices and Microstructures. 47:78-82 |
| ISSN: | 0749-6036 |
| DOI: | 10.1016/j.spmi.2009.07.033 |
| Popis: | We report on the optical properties of site-controlled InGaAs dots in GaAs barriers grown in pre-patterned, large pitch, pyramidal recesses by metalorganic vapour phase epitaxy. The inhomogeneous broadening of excitonic emission from an ensemble of quantum dots is found to be extremely narrow, with a standard deviation of 1.19 meV. A dramatic improvement in the spectral purity of emission lines from individual dots is also reported (18-30 mu eV) when compared to the state-of-the-art for site controlled quantum dots. (C) 2009 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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