Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 54: Photonics I
Q 54.2: Talk
Friday, March 21, 2014, 11:00–11:15, UDL HS3038
Tapered Fiber Coupling of Single Photons Emitted by a Deterministically Positioned Single NV-Center — •Lars Liebermeister1, Daniel Burchardt1, Andreas W. Schell4, Oliver Benson4, Ariane Stiebeiner3, Arno Rauschenbeutel3, Harald Weinfurter1,2, and Markus Weber1,2 — 1Ludwig-Maximilians-Universität, München — 2Max-Planck-Institut für Quantenoptik, Garching — 3Technische Universität Wien - Atominstitut, Wien — 4Humboldt-Universität zu Berlin
The development of high yield single photon sources is crucial for applications in quantum information as well as for experiments on the foundations of quantum physics. In this context the nitrogen vacancy center in diamond is a promising solid state candidate.
In our approach a diamond nano-crystal hosting a single NV-center is optically selected with a confocal scanning microscope and positioned deterministically onto the subwavelength-diameter waist of a tapered optical fiber (TOF) with the help of an atomic force microscope. Based on this nano-manipulation technique we experimentally demonstrate the evanescent coupling of single fluorescence photons emitted by a single NV-center to the guided mode of the TOF. By comparing photon count rates of the fiber-guided and the free-space modes and with the help of numerical FDTD simulations we determine a lower and upper bound for the coupling efficiency of (9.4 ± 0.6)% and (10.4 ± 0.7)% [1]. Our results are a promising starting point for future integration of single photon sources in photonic quantum networks and applications in quantum information science. [1] arXiv:1309.0421