Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies

ORAL

Abstract

Color centers in diamond are widely explored as qubits in quantum technologies. However, challenges remain in the effective and efficient integration of these diamond-hosted qubits in device heterostructures. Here, nanoscale-thick uniform diamond membranes are synthesized via ``smart-cut'' and isotopically (12C) purified overgrowth. These membranes have tunable thicknesses (demonstrated 50 nm to 250 nm), are deterministically transferable, have bilaterally atomically flat surfaces (≤0.3 nm), and bulk-diamond-like crystallinity. Color centers are synthesized via both implantation and in-situ overgrowth incorporation. Within 110 nm-thick membranes, individual germanium-vacancy (GeV-) centers exhibit stable photoluminescence at 5.4 K and average optical transition linewidths as low as 125 MHz. The room temperature spin coherence of individual nitrogen-vacancy (NV-) centers shows Ramsey spin dephasing times (T2*) and Hahn echo times (T2) as long as 150 μs and 400 μs, respectively. This platform enables the straightforward integration of diamond membranes that host coherent color centers into quantum technologies.

*This work was primarily supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division with support from the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers. The work also receives support from the University of Chicago Materials Research Science and Engineering Center (funded by NSF DMR-2011854). This work made use of the Pritzker Nanofabrication Facility part of the Pritzker School of Molecular Engineering at the University of Chicago, which receives support from Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-2025633). Funding was provided by the Boeing Company and the University of Chicago Joint Task Force Initiative. J. K. and A. B. acknowledge support from the NSF Graduate Research Fellowship (DGE-1746045).

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Publication: arxiv:2109.11507

Presenters

  • Xinghan Guo

    • University of Chicago

Authors

  • Xinghan Guo

    • University of Chicago

  • Nazar Delegan

    • Argonne National Laboratory

  • Jonathan C Karsch

    • University of Chicago

  • Zixi Li

    • University of Chicago

  • Tianle Liu

    • University of Chicago

  • Robert T Shreiner

    • University of Chicago

  • Amy Butcher

    • University of Chicago

  • David D Awschalom

    • University of Chicago and Argonne National Laboratory
    • University of Chicago
    • University of Chicago, Argonne National Laboratory

  • F. Joseph F Heremans

    • Argonne National Laboratory and University of Chicago
    • Argonne National Laboratory

  • Alexander A High

    • University of Chicago