Hannover 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 55: Poster II
Q 55.57: Poster
Donnerstag, 11. März 2010, 16:00–19:00, Lichthof
A single photon source with diamond nanocrystals — •Juliane Hermelbracht1, James Rabeau3, Ariane Stiebeiner4, Ruth Garcia Fernandez4, Arno Rauschenbeutel4, and Harald Weinfurter1,2 — 1FAkultät für Physik, Ludwig-Maximilians-Universität, München, Germany — 2Max-Planck-Institut für Quantenoptik, Garching, Germany — 3Macquarie University, Sydney, Australia — 4Johannes-Gutenberg-Universität, Mainz, Germany
The development of reliable devices to generate single photons is crucial for applications in quantum cryptography, as well as for fundamental quantum optics experiments. With an optical emission centered around 650nm and a fluorescence lifetime of 11.6ns the nitrogen-vacancy (NV) color center in diamond seems well suited for implementing a single photon source which could be used in quantum cryptography experiments. The efficiency of the NV-center is, however, limited by the existence of a shelving level. Additionally the high refractive index of bulk diamond restricts the efficiency to collect the fluorescence light. A more convenient approach is the use of NV-center containing diamond nanocrystals, which - being much smaller than the wavelength of the fluorescence light - are not subject to refraction. Furthermore, diamond nanocrystals can be combined with a wide variety of microstructures and thus e.g. be incorporated into cavity-structures. We describe attempts to apply single NV-containing diamond nanocrystals to the waist of tapered optical fibers in order to manipulate the single photon emission characteristics.