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 language | English |
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Article number | 191113 |
Number of pages | 4 |
Journal | Applied Physics Letters |
Volume | 103 |
Issue number | 19 |
DOIs | |
Publication status | Published - 4 Nov 2013 |