Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 23: Poster 2: Intersectional Session
Q 23.55: Poster
Tuesday, March 15, 2011, 18:00–21:00, P1
Towards coupling of a single N-V center in diamond to a fiber based micro- cavity — •Roland Albrecht1, Christian Deutsch2, Jakob Reichel2, Tim Schröder3, Rico Henze3, Oliver Benson3, and Christoph Becher1 — 1Fachrichtung 7.2, (Experimentalphysik), Universität des Saarlandes, Campus E2.6, 66123 Saarbrücken — 2Laboratoire Kastler Brossel, ENS/UPMC-Paris 6/CNRS, 24 rue Lhomond, 75005 Paris, France — 3Institut für Physik, AG Nanooptik, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin
Coupling a single N-V center in diamond to a micro-cavity is a crucial step towards sucessful implementation of many quantum information protocols.[1] We here investigate fiber based Fabry Perot cavities which consist of a flat dielectric mirror and an optical fiber. N-V centers in diamond nanocrystals are deposited onto the flat mirror by spin coating. This cavity design has several advantages: it is tunable, can be scanned transversally and is automatically fiber-coupled with very good efficiency. To achieve stable cavities, a concave impression has been produced on the fiber facet by laser machining prior to deposition of a dielectric coating. As a second approach for fabrication of the concave mirror we investigate focused ion beam milling of tapered fibers, allowing for enhanced design flexibility. Cavities using mirrors with radii of curvature of about 50 µ m, with a finesse of up to 3000 and a length of 5 µ m have been realized. We observe emission of a single N-V center into the fiber cavity.
[1] S. Prawer and A.D. Greentree, Science 320, 1601 (2008)