Purcell Enhancement of a Cavity-Coupled Single Spin Defect in Silicon Carbide

ORAL

Abstract

Silicon carbide (SiC) has recently been developed as a platform for optically addressable spin defects in the form of the neutral divacancy, most notably in the 4H polytype [1-3]. Here we present the Purcell enhancement of a single divacancy coupled to a photonic crystal cavity. We use a combination of nanolithographic techniques and a dopant-selective photoelectrochemical etch to produce suspended cavities with quality factors exceeding 5000. This corresponds to a Purcell factor of ~50 for a divacancy within the cavity mode and results in an increased photoluminescence into the zero-phonon line (ZPL) when on resonance with the cavity, as well as a shortened excited state lifetime. Additionally, we observe coherent control of the divacancy ground state spin inside of the cavity nanostructure. This system represents a major advance towards applications for the scalability of long-distance entanglement protocols using SiC that require the interference of indistinguishable photons from spatially separated single qubits.

*This work is supported by AFOSR, ARO, NDSEG, NSF, and UChicago MRSEC.

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Presenters

  • Alexander Crook

    • Pritzker School of Molecular Engineering, University of Chicago
    • Department of Physics, University of Chicago
    • University of Chicago

Authors

  • Alexander Crook

    • Pritzker School of Molecular Engineering, University of Chicago
    • Department of Physics, University of Chicago
    • University of Chicago

  • Christopher Anderson

    • Pritzker School of Molecular Engineering, University of Chicago
    • Department of Physics, University of Chicago
    • University of Chicago

  • Kevin Miao

    • Pritzker School of Molecular Engineering, University of Chicago
    • University of Chicago

  • Alexandre Bourassa

    • University of Chicago
    • Pritzker School of Molecular Engineering, University of Chicago

  • Hope Lee

    • Department of Physics, University of Chicago

  • Sam L Bayliss

    • Pritzker School of Molecular Engineering, University of Chicago

  • David O Bracher

    • Department of Physics, Harvard University

  • Xingyu Zhang

    • Department of Physics, Harvard University

  • Hiroshi Abe

    • National Institutes for Quantum and Radiological Science and Technology
    • National Institutes for Quantum and Radiological Science and Technology (QST)

  • Takeshi Ohshima

    • Natl Inst for Quantum & Radiological Science & Tech (QST)
    • National Institutes for Quantum and Radiological Science and Technology
    • National Institutes for Quantum and Radiological Science and Technology (QST)

  • Evelyn L Hu

    • Department of Physics, Harvard University

  • David Awschalom

    • Pritzker School of Molecular Engineering, University of Chicago
    • University of Chicago