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Journal Articles Nature Photonics Year : 2010

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

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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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Dates and versions

hal-00570650 , version 1 (28-02-2011)

Identifiers

  • HAL Id : hal-00570650 , version 1

Cite

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, 2010, 4 (3), pp.174-177. ⟨hal-00570650⟩
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