A site-controlled quantum dot system offering both high uniformity and spectral purity

Details A site-controlled quantum dot system offering both high uniformity and spectral purity A site-controlled quantum dot system offering both high uniformity and spectral purity

2009-06-22

arxiv.org/abs/0906.4066v1

Applied Physics Letters 94, 223121 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 3 figures

Scientific paper

In this paper we report on the optical properties of site controlled InGaAs dots with GaAs barriers grown in pyramidal recesses by metalorganic vapour phase epitaxy. The inhomogeneous broadening of excitonic emission from an ensemble of quantum dots is found to be unusually narrow, with a standard deviation of 1.19 meV, and spectral purity of emission lines from individual dots is found to be very high (18-30 ueV), in contrast with other site-controlled systems.

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