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Indistinguishable photons from a single-photon device

Author

Listed:
  • Charles Santori

    (Stanford University)

  • David Fattal

    (Stanford University)

  • Jelena Vučković

    (Stanford University)

  • Glenn S. Solomon

    (Stanford University
    Stanford University)

  • Yoshihisa Yamamoto

    (Stanford University
    Atsugi)

Abstract

Single-photon sources have recently been demonstrated using a variety of devices, including molecules1,2,3, mesoscopic quantum wells4, colour centres5, trapped ions6 and semiconductor quantum dots7,8,9,10,11. Compared with a Poisson-distributed source of the same intensity, these sources rarely emit two or more photons in the same pulse. Numerous applications for single-photon sources have been proposed in the field of quantum information, but most—including linear-optical quantum computation12—also require consecutive photons to have identical wave packets. For a source based on a single quantum emitter, the emitter must therefore be excited in a rapid or deterministic way, and interact little with its surrounding environment. Here we test the indistinguishability of photons emitted by a semiconductor quantum dot in a microcavity through a Hong–Ou–Mandel-type two-photon interference experiment13,14. We find that consecutive photons are largely indistinguishable, with a mean wave-packet overlap as large as 0.81, making this source useful in a variety of experiments in quantum optics and quantum information.

Suggested Citation

  • Charles Santori & David Fattal & Jelena Vučković & Glenn S. Solomon & Yoshihisa Yamamoto, 2002. "Indistinguishable photons from a single-photon device," Nature, Nature, vol. 419(6907), pages 594-597, October.
    • Handle: RePEc:nat:nature:v:419:y:2002:i:6907:d:10.1038_nature01086
    DOI: 10.1038/nature01086
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    Cited by:

    1. Lukas Husel & Julian Trapp & Johannes Scherzer & Xiaojian Wu & Peng Wang & Jacob Fortner & Manuel Nutz & Thomas Hümmer & Borislav Polovnikov & Michael Förg & David Hunger & YuHuang Wang & Alexander Hö, 2024. "Cavity-enhanced photon indistinguishability at room temperature and telecom wavelengths," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. B. Jonas & D. Heinze & E. Schöll & P. Kallert & T. Langer & S. Krehs & A. Widhalm & K. D. Jöns & D. Reuter & S. Schumacher & A. Zrenner, 2022. "Nonlinear down-conversion in a single quantum dot," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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