New techniques for NV-diamond ensemble magnetometry

POSTER

Abstract

We describe new techniques for precision magnetometry using ensembles of NV centers in diamond. One technique uses the large refractive index of diamond as a light guide to achieve much higher fluorescence detection efficiency than provided by high NA microscope objectives. Another technique employs the m = +/-1 basis states of the NV triplet ground state, which may give improved magnetometry for small static magnetic fields. Dynamic decoupling pulse sequences can also improve the effective spin coherence time for NV ensembles. An alternate approach measures the absorption of the NV excitation light by an optically thick diamond sample.

Authors

  • Keigo Arai

    • MIT

  • David Le Sage

    • Harvard-Smithsonian
    • Harvard University

  • Nir Bar-Gill

    • Harvard-Smithsonian
    • Harvard-Smithsonian Center for Astrophysics
    • Harvard University

  • Chinmay Belthangady

    • Harvard-Smithsonian Center for Astrophysics
    • Harvard-Smithsonian

  • David Glenn

    • Harvard-Smithsonian
    • Harvard-Smithsonian Center for Astrophysics
    • Harvard University

  • Alexei Trifonov

    • Harvard
    • Harvard University

  • Ronald Walsworth

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