Hamburg 2009 – wissenschaftliches Programm

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SYDD: Defect centers in diamond for applications in quantum optics and nanophotonics

SYDD 1: Defect centers in diamond for applications in quantum optics and nanophotonics I

SYDD 1.3: Hauptvortrag

Freitag, 6. März 2009, 11:30–12:00, Audi-B

Controlling nonclassical emission of light in diamond — •H. Weinfurter¹, J. Bahe¹, C.L. Wang¹, X.Q. Zhou², T. Kippenberg², A. Stiebeiner³, A. Rauschenbeutel³, and J. Meijer⁴ — ¹L.-M. Universität München, Sektion Physik, Schellingstr. 4/III, D-80799 München — ²Max-Planck-Institut f. Quantenoptik, Hans-Kopfermann.Str. 1, D-85748 Garching — ³Universität Mainz, Staudingerweg 7, D-55128 Mainz — ⁴Ruhr-Universität Bochum, Universitätsstr. 150, D-44801 Bochum

The development of reliable devices to generate single photons is crucial for applications in quantum cryptography, as well as for fundamental quantum optics experiments. But the quality and yield of colour center based sources is intrinsically limited by broad bandwidth, shelving states, or the high index of refraction of diamond. Here we report on several attempts to improve the performance, like doping of diamond to control the charge state of single SiV centers, usage of solid immersion lenses, and coupling defects in nano crystals to the evanescent field of microdisk cavities or of tapered fibers.