Cascaded emission of linearly polarized single photons from positioned InP/GaInP quantum dots

T. Braun*, S. Unsleber, V. Baumann, M. Gschrey, S. Rodt, S. Reitzenstein, C. Schneider, S. Hoefling, M. Kamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We report on the optical characterization of site-controlled InP/GaInP quantum dots (QDs). Spatially resolved low temperature cathodoluminescence proves the long-range ordering of the buried emitters, revealing a yield of similar to 90% of optically active, positioned QDs and a strong suppression of emitters on interstitial positions. The emission of single QDs shows a pronounced degree of linear polarization along the [0,-1,1] crystal axis with an average degree of polarization of 94%. Photon correlation measurements of the emission from a single QD indicate the single-photon character of the exciton and biexciton emission lines as well as the cascaded nature of the photon pair. (c) 2013 AIP Publishing LLC.

Original languageEnglish
Article number191113
Number of pages4
JournalApplied Physics Letters
Volume103
Issue number19
DOIs
Publication statusPublished - 4 Nov 2013

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