Characterizing a 72-channel defect-free array of diamond quantum memories in a photonic integrated circuit

ORAL

Abstract

In a previous abstract, we described the unity creation, coupling and integration of diamond "artificial atoms" of silicon vacancy (SiV) and germanium vacancy (GeV) centers with a large-scale photonic integrated circuit (PIC) in aluminum nitride. Here, we present the characterization of our 72-channel quantum memory chip. First, we demonstrate the routing of single-photon emission from 72 distinct optical channels in a fiber-coupled PIC. We performed low-temperature spectroscopy of the emitters, finding near-lifetime-limited optical transitions from both SiV and GeV centers following nanofabrication, micromanipulation, and heterogeneous integration. Additionally, we demonstrate the tuning of optical transitions with the same integrated system, overcoming the spectral inhomogeneities between separate emitter-waveguide systems. These advances set the stage for high-rate, multi-channel photon-mediated entanglement for quantum repeaters and computers.

*We acknowledge support from ARL CDQI, NSF EFRI ACQUIRE, NSF CUA, NSF CIQM, DoD NDSEG, NSF GRFP, IC Postdoctoral Fellowship, MIT Lincoln Lab, NASA Space Technology Research Fellowship

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Presenters

  • Noel Wan

    • Massachusetts Institute of Technology MIT
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT

Authors

  • Noel Wan

    • Massachusetts Institute of Technology MIT
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT

  • Tsung-Ju Lu

    • Massachusetts Institute of Technology MIT
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT

  • Kevin Chen

    • Massachusetts Institute of Technology MIT
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Michael P Walsh

    • Massachusetts Institute of Technology MIT

  • Matthew Trusheim

    • Massachusetts Institute of Technology MIT
    • Harvard University

  • Lorenzo De Santis

    • Massachusetts Institute of Technology MIT

  • Eric A Bersin

    • Massachusetts Institute of Technology MIT

  • Isaac Harris

    • Massachusetts Institute of Technology MIT
    • SEAS, Harvard University
    • Massachusetts Institute of Technology

  • Sara Mouradian

    • Massachusetts Institute of Technology MIT

  • Edward S Bielejec

    • Sandia National Laboratories

  • Dirk R. Englund

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology MIT
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT
    • Research Laboratory of Electronics, Massachusetts Institute of Technology