A highly efficient single-photon source based on a quantum dot in a photonic wire

Abstract : The development of efficient solid-state sources of single photons is a major challenge in the context of quantum communication, optical quantum information processing and metrology. Such a source must enable the implementation of a stable, single-photon emitter, like a colour centre in diamond or a semiconductor quantum dot. Achieving a high extraction efficiency has long been recognized as a major issue, and both classical solutions and cavity quantum electrodynamics effects have been applied. We adopt a different approach, based on an InAs quantum dot embedded in a GaAs photonic nanowire with carefully tailored ends. Under optical pumping, we demonstrate a record source efficiency of 0.72, combined with pure single-photon emission. This non-resonant approach also provides broadband spontaneous emission control, thus offering appealing novel opportunities for the development of single-photon sources based on spectrally broad emitters, wavelength-tunable sources or efficient sources of entangled photon pairs.
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Contributor : Christophe Sauvan <>
Submitted on : Monday, February 28, 2011 - 5:57:46 PM
Last modification on : Tuesday, November 5, 2019 - 2:30:08 PM

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  • HAL Id : hal-00570650, version 1

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Julien Claudon, J. Bleuse, N.S. Malik, M. Bazin, P. Jaffrennou, et al.. A highly efficient single-photon source based on a quantum dot in a photonic wire. Nature Photonics, Nature Publishing Group, 2010, 4 (3), pp.174-177. ⟨hal-00570650⟩

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