Stuttgart 2012 – wissenschaftliches Programm
Q 35.81: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II
Single Photon Source with Diamond Nanocrystals on Tapered Optical Fibers — •Lars Liebermeister1, Daniel Burchardt1, Juliane Hermelbracht1, Toshiyuki Tashima1, Markus Weber1, Ariane Stiebeiner3, Arno Rauschenbeutel3, and Harald Weinfurter1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching — 3Technische Universität Wien - Atominstitut, Wien, Austria
The development of high yield single photon sources is crucial for applications in quantum information as well as for experiments on the foundations quantum optics. The NV-center in diamond is a promising solid state candidate, however, in bulk diamond the collection efficiency is limited due to total internal reflection. To overcome this problem the use of nanodiamonds has become an auspicious approach, additionally providing the possibility for coupling to intregrated nano-optical elements as well as plasmonic and nanocavity structures.
We follow the approach of coupling the single photon emission of an NV-center in a nanodiamond to the evanescent field of the guided mode in a tapered optical fiber. Theory predicts up to 28% coupling efficiency under ideal conditions. With nanodiamonds on the tapered region and their excitation perpendicular to the fiber axis we observed the NV-emission in the guided mode of the fiber. Our new AFM-Setup will provide a more deterministic handling of the nanodiamonds and allows the positioning of selected nanocrystals on the taper region.  Huck et al.: Phys. Rev. Lett. 106, 2011;  Dumeige et al.: New J. Phys. 13(2), 2011;  Kien et al.: Phys. Rev. A 72(3), 2005