Progress on NV-diamond ensemble magnetometry

ORAL

Abstract

We discuss progress on new techniques for precision magnetometry using ensembles of NV centers in diamond. One technique uses the large refractive index diamond substrate as a light guide to achieve much higher fluorescence detection efficiency than provided by high NA microscope objectives. An alternate approach measures the absorption of the NV excitation light by an optically thick diamond sample. In all approaches, diamond sample engineering plays a crucial role in finding an optimal balance between the NV center density and NV spin coherence time.

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Authors

  • David Le Sage

    • Harvard-Smithsonian
    • Harvard University

  • My Linh Pham

    • Harvard University
    • Harvard

  • Keigo Arai

    • MIT

  • Andrew Higginbotham

    • Harvard

  • Paul Stanwix

    • University of Western Australia

  • Ye Zhao

    • Harvard

  • Ronald Walsworth

    • Harvard-Smithsonian Center for Astrophysics; Department of Physics, Harvard University
    • Harvard-Smithsonian Center for Astrophysics
    • Harvard-Smithsonian
    • Harvard University