title: Scalable Quantum Photonics with Single Color Centers in Silicon Carbide.
abstract: Silicon carbide is a promising platform for single photon sources, quantum bits (qubits), and nanoscale sensors based on individual color centers. Toward this goal, we develop a scalable array of nanopillars incorporating single silicon vacancy centers in 4H-SiC, readily available for efficient interfacing with free-space objective and lensed-fibers. A commercially obtained substrate is irradiated with 2 MeV electron beams to create vacancies. Subsequent lithographic process forms 800 nm tall nanopillars with 400-1400 nm diameters. We obtain high collection efficiency of up to 22 kcounts/s optical saturation rates from a single silicon vacancy center while preserving the single photon emission and the optically induced electron-spin polarization properties. Our study demonstrates silicon carbide as a readily available platform for scalable quantum photonics architecture relying on single photon sources and qubits.
authors.affiliation: E. L. Ginzton Laboratory, Stanford University , Stanford, California 94305, United States.
authors.forename: Marina
authors.identifier: 0000-0001-9606-3716
authors.initials: M
authors.lastname: Radulaski
authors.affiliation: 3rd Institute of Physics, IQST, and Research Center SCOPE, University of Stuttgart , 70569 Stuttgart, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Widmann
authors.affiliation: 3rd Institute of Physics, IQST, and Research Center SCOPE, University of Stuttgart , 70569 Stuttgart, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Niethammer
authors.affiliation: E. L. Ginzton Laboratory, Stanford University , Stanford, California 94305, United States.
authors.forename: Jingyuan Linda
authors.initials: JL
authors.lastname: Zhang
authors.affiliation: 3rd Institute of Physics, IQST, and Research Center SCOPE, University of Stuttgart , 70569 Stuttgart, Germany.|Center for Quantum Information, Korea Institute of Science and Technology (KIST) , Seoul, 02792, Republic of Korea.
authors.forename: Sang-Yun
authors.initials: SY
authors.lastname: Lee
authors.affiliation: 3rd Institute of Physics, IQST, and Research Center SCOPE, University of Stuttgart , 70569 Stuttgart, Germany.
authors.forename: Torsten
authors.initials: T
authors.lastname: Rendler
authors.affiliation: E. L. Ginzton Laboratory, Stanford University , Stanford, California 94305, United States.
authors.forename: Konstantinos G
authors.initials: KG
authors.lastname: Lagoudakis
authors.affiliation: Department of Physics, Chemistry, and Biology, Linköping University , SE-58183 Linköping, Sweden.
authors.forename: Nguyen Tien
authors.initials: NT
authors.lastname: Son
authors.affiliation: Department of Physics, Chemistry, and Biology, Linköping University , SE-58183 Linköping, Sweden.
authors.forename: Erik
authors.initials: E
authors.lastname: Janzén
authors.affiliation: National Institutes for Quantum and Radiological Science and Technology (QST) , Takasaki, Gunma 370-1292, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ohshima
authors.affiliation: 3rd Institute of Physics, IQST, and Research Center SCOPE, University of Stuttgart , 70569 Stuttgart, Germany.
authors.forename: Jörg
authors.initials: J
authors.lastname: Wrachtrup
authors.affiliation: E. L. Ginzton Laboratory, Stanford University , Stanford, California 94305, United States.
authors.forename: Jelena
authors.initials: J
authors.lastname: Vučković
keywords: Color centers; nanopillars; photonics; silicon carbide; spin-qubits; spintronics