Bright single photon source based on self-aligned quantum dot-cavity systems

Sebastian Maier*, Peter Gold, Alfred Forchel, Niels Gregersen, Jesper Mork, Sven Höfling, Christian Schneider, Martin Kamp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


We report on a quasi-planar quantum-dot-based single-photon source that shows an unprecedented high extraction efficiency of 42% without complex photonic resonator geometries or post-growth nanofabrication. This very high efficiency originates from the coupling of the photons emitted by a quantum dot to a Gaussian shaped nanohill defect that naturally arises during epitaxial growth in a self-aligned manner. We investigate the morphology of these defects and characterize the photonic operation mechanism. Our results show that these naturally arising coupled quantum dot-defects provide a new avenue for efficient (up to 42% demonstrated) and pure (g2(0) value of 0.023) single-photon emission. (C) 2014 Optical Society of America

Original languageEnglish
Pages (from-to)8136-8142
Number of pages7
JournalOptics Express
Issue number7
Early online date31 Mar 2014
Publication statusPublished - 7 Apr 2014


  • Efficiency
  • Optics


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