Bright single photon source based on self-aligned quantum dot–cavity systems
Year: 2014
Type: article
Abstract: 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 (g(2)(0) value of 0.023) single-photon emission.
Source: Optics Express
DOI: 10.1364/oe.22.008136
Authors: Sebastian Maier, Peter Gold, Alfred Forchel, Niels Gregersen, Jesper Mørk, Sven Höfling, Christian Schneider, Martin Kamp
Institution: University of Würzburg
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,270
Award: G2808123169
OpenAlex ID: W1988815619