Pyramidal quantum dots: High uniformity and narrow excitonic emission

Mereni, L. O. and Dimastrodonato, V. and Young, R. J. and Pelucchi, E. (2010) Pyramidal quantum dots: High uniformity and narrow excitonic emission. Superlattices and Microstructures, 47 (1). pp. 78-82. ISSN 0749-6036

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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.

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Superlattices and Microstructures
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07 Jun 2012 10:31
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21 Nov 2022 22:22