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Discovery and Optical Characterization of Hidden Silicon-Vacancy Centers in Diamond

ORAL

Abstract

Color centers in diamond and other wide-bandgap semiconductors have drawn a great deal of attention recently as candidate material systems for quantum devices. In spite of this, an ideal color-center qubit system has yet to be discovered, and there remain important open questions related to the inner workings of different types of color centers as well as the interactions that occur between centers situated in close proximity. Here we report a series of novel measurements [1] on a high-density sample of a particular color-center type—negatively charged silicon-vacancy (SiV-) centers in diamond—using collinear optical multidimensional coherent spectroscopy (MDCS). The measurements reveal a hidden population of silicon-vacancy centers, which are not typically observed in photoluminescence, and which exhibit a high degree of spectral inhomogeneity and longer-than-expected single-particle electronic T2 dephasing times. The phenomenon is likely caused by strain, indicating opportunities for controllably mediating electronic coherence in color-center-based quantum devices.

[1] C. L. Smallwood, et al., arXiv:2006.02323 (2020)

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Presenters

  • Christopher Smallwood

    Physics and Astronomy, San Jose State University, San Jose State University

Authors

  • Christopher Smallwood

    Physics and Astronomy, San Jose State University, San Jose State University

  • Ronald Ulbricht

    Max Planck Institute for Polymer Research

  • Matthew W Day

    Physics, University of Michigan, University of Michigan

  • Tim Schröder

    Humboldt-Universität zu Berlin

  • Kelsey Bates

    Physics, University of Michigan, University of Michigan

  • Travis M Autry

    JILA, University of Colorado and NIST, National Institute of Standards and Technology Boulder

  • Geoffrey Diederich

    Physics and Astronomy, University of Denver

  • Edward Bielejec

    Sandia National Laboratories, Center for Integrated Nanotechnologies, Sandia National Laboratories

  • Mark Siemens

    Physics and Astronomy, University of Denver

  • Steven Thomas Cundiff

    Physics, University of Michigan, University of Michigan, Department of Physics, University of Michigan, Physics Department, University of Michigan