title: An integrated diamond nanophotonics platform for quantum-optical networks.
abstract: Efficient interfaces between photons and quantum emitters form the basis for quantum networks and enable optical nonlinearities at the single-photon level. We demonstrate an integrated platform for scalable quantum nanophotonics based on silicon-vacancy (SiV) color centers coupled to diamond nanodevices. By placing SiV centers inside diamond photonic crystal cavities, we realize a quantum-optical switch controlled by a single color center. We control the switch using SiV metastable states and observe optical switching at the single-photon level. Raman transitions are used to realize a single-photon source with a tunable frequency and bandwidth in a diamond waveguide. By measuring intensity correlations of indistinguishable Raman photons emitted into a single waveguide, we observe a quantum interference effect resulting from the superradiant emission of two entangled SiV centers.
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.
authors.forename: A
authors.initials: A
authors.lastname: Sipahigil
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Evans
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.|Russian Quantum Center, Skolkovo, Moscow 143025, Russia.|P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991, Russia.
authors.forename: D D
authors.initials: DD
authors.lastname: Sukachev
authors.affiliation: John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
authors.forename: M J
authors.initials: MJ
authors.lastname: Burek
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.
authors.forename: J
authors.initials: J
authors.lastname: Borregaard
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.
authors.forename: M K
authors.initials: MK
authors.lastname: Bhaskar
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.
authors.forename: C T
authors.initials: CT
authors.lastname: Nguyen
authors.affiliation: Sandia National Laboratories, Albuquerque, NM 87185, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Pacheco
authors.affiliation: John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
authors.forename: H A
authors.initials: HA
authors.lastname: Atikian
authors.affiliation: John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
authors.forename: C
authors.initials: C
authors.lastname: Meuwly
authors.affiliation: Sandia National Laboratories, Albuquerque, NM 87185, USA.
authors.forename: R M
authors.initials: RM
authors.lastname: Camacho
authors.affiliation: Institute for Quantum Optics, University of Ulm, 89081 Ulm, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Jelezko
authors.affiliation: Sandia National Laboratories, Albuquerque, NM 87185, USA.
authors.forename: E
authors.initials: E
authors.lastname: Bielejec
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA.|Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA.
authors.forename: H
authors.initials: H
authors.lastname: Park
authors.affiliation: John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
authors.forename: M
authors.initials: M
authors.lastname: Lončar
authors.affiliation: Department of Physics, Harvard University, Cambridge, MA 02138, USA. lukin@physics.harvard.edu.
authors.forename: M D
authors.initials: MD
authors.lastname: Lukin