Quantum key distribution using quantum dot single-photon emitting diodes in the red and near infrared spectral range
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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.
Heindel , T , Kessler , C A , Rau , M , Schneider , C , Fuerst , M , Hargart , F , Schulz , W-M , Eichfelder , M , Rossbach , R , Nauerth , S , Lermer , M , Weier , H , Jetter , M , Kamp , M , Reitzenstein , S , Höfling , S , Michler , P , Weinfurter , H & Forchel , A 2012 , ' Quantum key distribution using quantum dot single-photon emitting diodes in the red and near infrared spectral range ' New Journal of Physics , vol 14 , 083001 . DOI: 10.1088/1367-2630/14/8/083001
New Journal of Physics
© 2012 IOP Publishing and Deutsche Physikalische Gesellschaft. Tobias Heindel et al 2012 New J. Phys. 14 083001. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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