1. Quantum key distribution using quantum dot single-photon emitting diodes in the red and near infrared spectral range.
- Author
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Heindel, Tobias, Kessler, Christian A., Rau, Markus, Schneider, Christian, Fürst, Martin, Hargart, Fabian, Schulz, Wolfgang-Michael, Eichfelder, Marcus, Roßbach, Robert, Nauerth, Sebastian, Lermer, Matthias, Weier, Henning, Jetter, Michael, Kamp, Martin, Reitzenstein, Stephan, Höfling, Sven, Michler, Peter, Weinfurter, Harald, and Forchel, Alfred
- Subjects
QUANTUM dots ,QUANTUM cryptography ,CHARGE coupled devices ,METAL organic chemical vapor deposition ,PHOTOLITHOGRAPHY - 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. [ABSTRACT FROM AUTHOR]- Published
- 2012
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