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.

–

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