Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 38: Quantum information: Photons and nonclassical light I
Q 38.8: Talk
Thursday, March 20, 2014, 12:15–12:30, UDL HS3038
Nanodiamond nitrogen vacancy centers coupled with tapered optical fibers as hybrid quantum nanophotonic devices — •Masazumi Fujiwara1,2,3, Mohamed Almokhtar1,2,4, Hideaki Takashima1,2, and Shigeki Takeuchi1,2 — 1Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan — 2The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan — 3Present address: Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, 12489 Berlin, Germany — 4Physics Department, Assiut University, Assiut, Egypt
Tapered optical fibers are promising one-dimensional nanophotonic waveguides that can provide efficient coupling of their fundamental mode and quantum nanoemitters placed inside them. Here we present numerical studies on the coupling of single nitrogen-vacancy (NV) centers in nanodiamonds with the tapered fibers. The results show that (1) the maximum of 53.4 % of coupling efficiency can be realized when the NV bare dipole is located at the center of the tapered fiber and that (2) NV centers even in 100-nm-sized nanodiamonds, where bulk-like optical properties were reported, show the coupling efficiency of 22 % at the taper surface. These results are an important guide to build hybrid quantum devices for applications in quantum information and quantum sensing.