Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 74: Focus Session: Semiconductor-based Quantum Communication I
HL 74.3: Topical Talk
Donnerstag, 29. März 2012, 10:30–11:00, ER 164
Electrically contacted quantum dot - micropillars: building blocks for future quantum communication systems — •Stephan Reitzenstein1,2, Tobias Heindel2, Peter Gold2, Manuel Gschrey2, Christian Schneider2, Sven Höfling2, Martin Kamp2, and Alfred Forchel2 — 1Present address: Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — 2Technische Physik, Universität Würzburg, Würzburg, Germany
Future quantum communication systems such the a quantum repeater will rely strongly on the availability of compact quantum light sources, quantum memories and interfaces for the interconversion between local qubits and flying qubits. In this respect, quantum dot (QD) - microcavity systems exploiting cavity quantum electrodynamics (cQED) effects are of particular interest. Indeed, cQED effects allow one to enhance the efficiency of QD based single photon sources and to realize coherent coupling between light and matter.
In this contribution, we will address the potential of high quality electrically contacted QD - micropillar cavities to act as building blocks for quantum communication systems. We will show that these structures can act as highly efficient single photon emitters and as such are very suitable sources for quantum key distribution systems. Moreover, electrically contacted QD - micropillars could pave the way for qubit interconversion which will be demonstrated by means of single quantum dot photocurrent spectroscopy.