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A versatile source of single photons for quantum information processing

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  • Michael Förtsch

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg
    SAOT, School in Advanced Optical Technologies)

  • Josef U. Fürst

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg)

  • Christoffer Wittmann

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg)

  • Dmitry Strekalov

    (Max Planck Institute for the Science of Light)

  • Andrea Aiello

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg)

  • Maria V. Chekhova

    (Max Planck Institute for the Science of Light)

  • Christine Silberhorn

    (Applied Physics, University of Paderborn)

  • Gerd Leuchs

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg)

  • Christoph Marquardt

    (Max Planck Institute for the Science of Light
    Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg)

Abstract

The generation of high-quality single-photon states with controllable narrow spectral bandwidths and central frequencies is key to facilitate efficient coupling of any atomic system to non-classical light fields. Such an interaction is essential in numerous experiments for fundamental science and applications in quantum communication and information processing, as well as in quantum metrology. Here we implement a fully tunable, narrow-band and efficient single-photon source based on a whispering gallery mode resonator. Our disk-shaped, monolithic and intrinsically stable resonator is made of lithium niobate and supports a cavity-assisted spontaneous parametric down-conversion process. The generated photon pairs are emitted into two highly tunable resonator modes. We verify wavelength tuning over 100 nm of both modes with controllable bandwidth between 7.2 and 13 MHz. Heralding of single photons yields anti-bunching with g(2)(0)

Suggested Citation

  • Michael Förtsch & Josef U. Fürst & Christoffer Wittmann & Dmitry Strekalov & Andrea Aiello & Maria V. Chekhova & Christine Silberhorn & Gerd Leuchs & Christoph Marquardt, 2013. "A versatile source of single photons for quantum information processing," Nature Communications, Nature, vol. 4(1), pages 1-5, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2838
    DOI: 10.1038/ncomms2838
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