Frankfurt 2006 – scientific programme
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Q: Quantenoptik und Photonik
Q 29: Poster Quanteneffekte
Q 29.1: Poster
Tuesday, March 14, 2006, 16:30–18:30, Labsaal
A narrow-band single photon source at room temperature — •Asli Ugur1, Chunlang Wang1, Vladimir Tchernychev2, and Harald Weinfurter1,3 — 1Department für Physik, LMU München, Germany — 2Experimentalphysik III, Ruhr-Universität Bochum, Bochum, Germany — 3Max-Planck-Institut für Quantenoptik, Garching, Germany
For applications in quantum cryptography a robust narrow-band single photon source is desirable. We report on single photon emission from SiV (silicon-vacancy) centers in diamond fabricated by ion implantation. Single SiV centers are photostable and have a spectrum consisting of a sharp zero phonon line (FWHM about 5 nm) at 738 nm and only very weak vibronic sidebands at room temperature. The short luminescence lifetime of 1.2 ns enables an efficient generation of single photons. To supress nonradiative transitions of single SiV centers, nitrogen doping by ion implantation was employed. We also discuss the use of a diamond solid immersion lens to improve the collection efficiency of single photons.