Spin-embedded diamond optomechanical resonator with a mechanical quality factor exceeding one million

Optica, vol. 13, pp. 485

Abstract

Diamond optomechanical crystal (OMC) devices with embedded color center spins are promising platforms for a broad range of applications in quantum sensing, networking, and computing, offering an interface between a GHz-frequency mechanical mode and both optical photons and coherent spins. A crucial but elusive step toward realizing this platform is to engineer a device with a high-quality factor mechanical mode while preserving the bulk-like coherence of embedded spins. Here, we demonstrate sideband-resolved diamond OMCs with mechanical quality factors in excess of 10 6 at cryogenic temperatures and find coherence times up to T 2 =227µs for embedded nitrogen-vacancy (NV) centers. Furthermore, we measure these devices across five orders of magnitude in intracavity optical power, demonstrating robust power handling and a high optomechanical cooperativity ( C ≫1) at cryogenic temperatures, which is essential for a broad range of quantum protocols requiring strong, coherent interactions between photons and phonons. These results are enabled by a robust, high-throughput method for forming single-crystal diamond membranes in combination with chemical vapor deposition (CVD) diamond overgrowth with nitrogen δ -doping. We discuss the prospects of this platform for hybrid spin-mechanical devices in the quantum regime.

Authors 15

1. Hyunseok Oh
   Affiliation as printed

   University of California

2. Viraj Dharod
   Affiliation as printed

   University of California

3. Lillian B. Hughes
   Affiliation as printed

   University of California

4. Jayameenakshi Venkatraman
   Affiliation as printed

   University of California

5. Shreyas Parthasarathy
   Affiliation as printed

   University of California

6. Ekaterina V. Osipova
   Affiliation as printed

   University of California

7. Ian Hedgepeth
   Affiliation as printed

   University of California

8. Jeffrey V. Cady
   Affiliation as printed

   University of California

9. Luca Basso

   Sandia National Laboratories California · Sandia National Laboratories

   Affiliation as printed

   Sandia National Laboratories

10. Y. F. Wang

    Los Alamos National Laboratory

    Affiliation as printed

    Los Alamos National Laboratory

11. Michael Titze

    Sandia National Laboratories California · Sandia National Laboratories

    Affiliation as printed

    Sandia National Laboratories

12. Edward S. Bielejec

    Sandia National Laboratories California · Sandia National Laboratories

    Affiliation as printed

    Sandia National Laboratories

13. Andrew M. Mounce

    Sandia National Laboratories California · Sandia National Laboratories

    Affiliation as printed

    Sandia National Laboratories

14. Dirk Bouwmeester Aachen

    Leiden University

    Affiliation as printed

    Leiden University

    University of California

15. Ania C. Bleszynski Jayich
    Affiliation as printed

    University of California