High-speed single-photon source based on self-organized quantum dots

E. Stock, W. Unrau, A. Lochmann, J. A. Töfflinger, M. Öztürk, A. I. Toropov, A. K. Bakarov, V. A. Haisler, D. Bimberg

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12 Scopus citations


We realized a fast single-photon source based on self-organized quantum dots (QDs). In a p-i-n structure a single electron and a single hole are funnelled into a single InAs quantum dot using a submicron AlOX current aperture. The out-coupling efficiency and emission rate are increased by embedding the single-photon source (SPS) into a micro-cavity of Q = 140. The resulting resonant single-QD diode generates single polarized photons at a repetition rate of 1 GHz exhibiting a second-order correlation function of g(2)(0) = 0. The measured optical response is usually limited by the time resolution of available single-photon detectors based on avalanche diodes. Here we present ultra-fast g(2) correlation functions, obtained with novel superconducting detectors.

Original languageEnglish
Article number014003
JournalSemiconductor Science and Technology
Issue number1
StatePublished - Jan 2011
Externally publishedYes


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