Berlin 2005 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 20: Symposium: Single Photon Sources and Spectroscopy of Individual Quantum Systems
HL 20.2: Vortrag
Samstag, 5. März 2005, 11:15–11:45, TU P270
Solid-state single-photon-sources for quantum cryptography — •H. Weinfurter1, Ch. Wang1, Ch. Braig1, P. Zarda1, and Ch. Kurtsiefer2 — 1Department für Physik, Ludwig-Maximilians-Universität, D-80799 München — 2Department of Physics, National University of Singapore, Singapore 117542, Singapore
Color centers in diamond turned out to be simple and reliable sources of single photons. Based on confocal microscope set-up, these sources can be operated at room-temperature without any sign of bleaching. For example the N-V (nitrogen-vacancy) center was already used in experiments on the complementarity principle and for quantum cryptography. Its disadvantages, in particular the broad emission spectrum, can be avoided when using different centers studied more recently. The talk introduces the method of creating single photons and gives an overview of experiments applying these novel sources.