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Q: Fachverband Quantenoptik und Photonik
Q 16: Solid State Photon Sources
Q 16.2: Vortrag
Dienstag, 15. März 2011, 11:00–11:15, HSZ 02
Single Photon Source with Diamond Nanocrystals on Tapered Optical Fibers — •Almut Tröller1, Juliane Hermelbracht1, Markus Weber1, Wenjamin Rosenfeld1, Ariane Stiebeiner3, Arno Rauschenbeutel3, James Rabeau4, and Harald Weinfurter1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching — 3Johannes-Gutenberg-Universität, Mainz — 4Macquarie University, Sydney
The development of reliable devices generating single photons is crucial for applications in quantum information as well as for fundamental experiments in quantum optics. Due to its properties the nitrogen-vacancy (NV) color center in diamond is considered a promising candidate for the implementation of such a device. Those properties include an optical transition at 637 nm with a fluorescence lifetime of 11.6 ns, high photostability and the possibility to work at room temperature.
However, the collection efficiency of the fluorescence light in bulk diamond is limited by the high refractive index of diamond. To resolve this issue we use diamond nanocrystals, which -- being smaller than the wavelength of the fluorescence light -- are not subject to refraction. In order to further enhance the single photon collection efficiency we aim at coupling the emission of a single NV center to the evanescent field of a tapered optical fiber. Here we present data on diamond nanocrystals containing NV centers and the first attempts towards their application to tapered fibers.