Direkt zum InhaltDirekt zur SucheDirekt zur Navigation
▼ Zielgruppen ▼

Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Tapered fiber coupling of single photons emitted by a deterministically positioned single nitrogen vacancy center

Lars Liebermeister, Fabian Petersen, Asmus v. Münchow, Daniel Burchardt, Juliane Hermelbracht, Toshiyuki Tashima, Andreas W Schell, Oliver Benson, Thomas Meinhardt, Anke Krueger, Ariane Stiebeiner, Arno Rauschenbeutel, Harald Weinfurter, and Markus Weber (2014)

Tapered fiber coupling of single photons emitted by a deterministically positioned single nitrogen vacancy center

Applied Physics Letters, 104(031101 ).

A diamond nano-crystal hosting a single nitrogen vacancy (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 finite-difference time domain simulations, we determine a lower and upper bound for the coupling efficiency of (9.5 ± 0.6)% and (10.4 ± 0.7)%, respectively. Our results are a promising starting point for future integration of single photon sources into photonic quantum networks and applications in quantum information science. Link