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Proceedings Paper

Near-field coupling of a single NV center to a tapered fiber
Author(s): Tim Schröder; Masazumi Fujiwara; Tetsuya Noda; Hong-Quan Zhao; Andreas W. Schell; Günter Kewes; Oliver Benson; Shigeki Takeuchi
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Paper Abstract

Further miniaturization of funcionalized quantum optical systems down to nm-dimensions and their integration into fibre optical networks is a major challange for future implementations of quantum information, quantum communication and quantum processing applications. Furthermore, scalability, long-term stability and room- as well as liquid helium temperature operation are benchmarking properties of such systems. In this paper, we present the realizations of fiber-coupled diamond-based single photon systems. First, an alignment free, μm-scale single photon source consisting of a single nitrogen vacancy center facet coupled to an optical fiber operating at room temperature is presented. Near-field coupling of the single nitrogen vacancy center is realized by placing a pre-selected nanodiamond directly on the fiber facet in a bottom-up approach. Its photon collection efficiency is comparable to a far-field collection via an air objective with a numerical aperture of 0.82. As the system can be simultaneously excited and its photons be recollected through the fiber, it can be used as a fiber-connected single quantum sensor that allows optical near-field probing on the quantum level. Secondly single nanodiamonds that contain nitrogen vacancy defect centers, are near-field coupled to a tapered fiber of 300 nanometer in diameter. This system provides a record-high number of 97 kcps single photons from a single defect center into a single mode optical fiber. The entire system can be cooled to liquid Helium temperatures and reheated without breaking. Furthermore, the system can be evanescently coupled to various nanophotonic structures, e.g. microresonators. The system can also be applied for integrated quantum transmission experiments and the realization of two-photon interference. It can be used as a quantum-randomnumber generator as well as a probe for nano-magnetometry.

Paper Details

Date Published: 23 February 2012
PDF: 9 pages
Proc. SPIE 8272, Advances in Photonics of Quantum Computing, Memory, and Communication V, 827209 (23 February 2012); doi: 10.1117/12.907961
Show Author Affiliations
Tim Schröder, Humboldt-Univ. zu Berlin (Germany)
Masazumi Fujiwara, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Tetsuya Noda, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Hong-Quan Zhao, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Andreas W. Schell, Humboldt-Univ. zu Berlin (Germany)
Günter Kewes, Humboldt-Univ. zu Berlin (Germany)
Oliver Benson, Humboldt-Univ. zu Berlin (Germany)
Shigeki Takeuchi, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 8272:
Advances in Photonics of Quantum Computing, Memory, and Communication V
Zameer Ul Hasan; Philip R. Hemmer; Hwang Lee; Charles M. Santori, Editor(s)

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