title: Manipulation of single nanodiamonds to ultrathin fiber-taper nanofibers and control of NV-spin states toward fiber-integrated λ-systems.
abstract: We report on the coupling of single nitrogen vacancy (NV) centers to ultrathin fiber-taper nanofibers by the manipulation of single diamond nanocrystals on the nanofibers under real-time observation of nanodiamond fluorescence. Spin-dependent fluorescence of the single NV centers is efficiently detected through the nanofiber. We show control of the spin sub-level structure of the electronic ground state using an external magnetic field and clearly observe a frequency fine tuning of [Formula: see text]. This observation demonstrates a possibility of realizing fiber-integrated quantum λ-systems, which can be used for various quantum information devices including push-pull quantum memory and quantum gates.
authors.affiliation: Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan. The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan. School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan.
authors.forename: Masazumi
authors.initials: M
authors.lastname: Fujiwara
authors.forename: Kazuma
authors.initials: K
authors.lastname: Yoshida
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Noda
authors.forename: Hideaki
authors.initials: H
authors.lastname: Takashima
authors.forename: Andreas W
authors.initials: AW
authors.lastname: Schell
authors.forename: Norikazu
authors.initials: N
authors.lastname: Mizuochi
authors.forename: Shigeki
authors.initials: S
authors.lastname: Takeuchi