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Quantum key distribution using quantum dot single-photon emitting diodes in the red and near infrared spectral range

  • Tobias Heindel
  • , Christian A. Kessler
  • , Markus Rau
  • , Christian Schneider
  • , Martin Fuerst
  • , Fabian Hargart
  • , Wolfgang-Michael Schulz
  • , Marcus Eichfelder
  • , Robert Rossbach
  • , Sebastian Nauerth
  • , Matthias Lermer
  • , Henning Weier
  • , Michael Jetter
  • , Martin Kamp
  • , Stephan Reitzenstein
  • , Sven Höfling
  • , Peter Michler
  • , Harald Weinfurter
  • , Alfred Forchel

Research output: Contribution to journalArticlepeer-review

Abstract

We report on in-lab free space quantum key distribution (QKD) experiments over 40 cm distance using highly efficient electrically driven quantum dot single-photon sources emitting in the red as well as near-infrared spectral range. In the case of infrared emitting devices, we achieve sifted key rates of 27.2 kbit s(-1)(35.4 kbit s(-1)) at a quantum bit error rate (QBER) of 3.9% (3.8%) and a g((2))(0) value of 0.35 (0.49) at moderate (high) excitation. The red emitting diodes generate sifted keys at a rate of 95.0 kbit s(-1) at a QBER of 4.1% and a g((2))(0) value of 0.49. This first successful proof of principle QKD experiment based on electrically operated semiconductor single-photon sources can be considered as a major step toward practical and efficient quantum cryptography scenarios.

Original languageEnglish
Article number083001
Number of pages12
JournalNew Journal of Physics
Volume14
DOIs
Publication statusPublished - 2 Aug 2012

Keywords

  • Secure communication
  • Cryptography
  • Quantum key distribution (QKD)

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