Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Optics of Solid State Photon Sources
Q 44.8: Talk
Thursday, March 17, 2011, 12:30–12:45, HSZ 02
Quantum key distribution using electrically triggered quantum dot-micropillar single photon sources — •Tobias Heindel1, Markus Rau2, Christian Schneider1, Martin Fürst2,3, Sebastian Nauerth2,3, Matthias Lermer1, Henning Weier2,3, Stephan Reitzenstein1, Sven Höfling1, Martin Kamp1, Harald Weinfurter2,4, and Alfred Forchel1 — 1Technische Physik and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 Munich, Germany — 3qutools GmbH, 80539 Munich, Germany — 4Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
In 1984, Bennett and Brassard proposed a secret key-distribution protocol (BB84) that uses the quantum mechanical properties of single photons to avoid the possibility of eavesdropping on an encoded message. Due to the lack of efficient single photon sources however most quantum key distribution (QKD) experiments have been performed with strongly attenuated lasers. First experiments utilizing optically pumped solid state based single photon sources affirmed the great potential of QKD but still suffered from the drawbacks of this excitation scheme.
In this work we report on a QKD experiment using highly efficient electrically triggered quantum dot - micropillar single photon sources with g(2)(0)-values below 0.5 and sifted key rates in the range of 10 kBit/s.