Journal article
Bright single photon source based on self-aligned quantum dot–cavity systems
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.
Language: | English |
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Year: | 2014 |
Pages: | 8136-8142 |
ISSN: | 10944087 |
Types: | Journal article |
DOI: | 10.1364/OE.22.008136 |
ORCIDs: | Gregersen, Niels and Mørk, Jesper |