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A quantum light-emitting diode for the standard telecom window around 1,550 nm

Author

Listed:
  • T. Müller

    (Toshiba Research Europe Limited)

  • J. Skiba-Szymanska

    (Toshiba Research Europe Limited)

  • A. B. Krysa

    (University of Sheffield)

  • J. Huwer

    (Toshiba Research Europe Limited)

  • M. Felle

    (Toshiba Research Europe Limited
    Cambridge University)

  • M. Anderson

    (Toshiba Research Europe Limited
    University of Cambridge)

  • R. M. Stevenson

    (Toshiba Research Europe Limited)

  • J. Heffernan

    (University of Sheffield)

  • D. A. Ritchie

    (University of Cambridge)

  • A. J. Shields

    (Toshiba Research Europe Limited)

Abstract

Single photons and entangled photon pairs are a key resource of many quantum secure communication and quantum computation protocols, and non-Poissonian sources emitting in the low-loss wavelength region around 1,550 nm are essential for the development of fibre-based quantum network infrastructure. However, reaching this wavelength window has been challenging for semiconductor-based quantum light sources. Here we show that quantum dot devices based on indium phosphide are capable of electrically injected single photon emission in this wavelength region. Using the biexciton cascade mechanism, they also produce entangled photons with a fidelity of 87 ± 4%, sufficient for the application of one-way error correction protocols. The material system further allows for entangled photon generation up to an operating temperature of 93 K. Our quantum photon source can be directly integrated with existing long distance quantum communication and cryptography systems, and provides a promising material platform for developing future quantum network hardware.

Suggested Citation

  • T. Müller & J. Skiba-Szymanska & A. B. Krysa & J. Huwer & M. Felle & M. Anderson & R. M. Stevenson & J. Heffernan & D. A. Ritchie & A. J. Shields, 2018. "A quantum light-emitting diode for the standard telecom window around 1,550 nm," Nature Communications, Nature, vol. 9(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03251-7
    DOI: 10.1038/s41467-018-03251-7
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