Near-field coupling of a single NV center to a tapered fiber

Tim Schröder, Masazumi Fujiwara, Tetsuya Noda, Hong Quan Zhao, Andreas W. Schell, Günter Kewes, Oliver Benson, Shigeki Takeuchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Furhter 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 nearfield 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. Furhtermore, 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.

Original languageEnglish
Title of host publicationAdvances in Photonics of Quantum Computing, Memory, and Communication V
Publication statusPublished - 2012
Externally publishedYes
EventAdvances in Photonics of Quantum Computing, Memory, and Communication V - San Francisco, CA, United States
Duration: Jan 23 2012Jan 26 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceAdvances in Photonics of Quantum Computing, Memory, and Communication V
Country/TerritoryUnited States
CitySan Francisco, CA


  • Fiber integration
  • Nano manipulation
  • Nanodiamond
  • Nitrogen-vacancy
  • Photonic crystal fiber
  • Sensor
  • Single emitter
  • Single photon
  • Source
  • Tapered fiber

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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