A high-speed, strain-free NV-diamond magnetic imager for neuroscience

ORAL

Abstract

Real-time wide-field imaging of dynamic magnetic fields finds broad applications from condensed matter physics to neuroscience. We present a broadband, high-sensitivity magnetic imaging system designed to map magnetic fields from arrays of firing neurons. The imager employs pulsed Ramsey protocols on an ensemble of nitrogen-vacancy (NV) centers in diamond, and it achieves enhanced sensitivity, bandwidth, and uniformity compared to conventional continuous-wave optically detected magnetic resonance (CW-ODMR) imaging. We show further improvements though implementing double-quantum coherence imaging, which mitigates inhomogeneous crystal-lattice strain and microwave gradients over of the field-of-view, and we demonstrate novel noise cancellation protocols. We present first images of nontrivial dynamic magnetic fields and steps toward real-time imaging of bio-magnetic fields from live, firing neurons.

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Presenters

  • Jennifer Schloss

    Massachusetts Institute of Technology, Physics, Massachusetts Institute of Technology, MIT

Authors

  • Jennifer Schloss

    Massachusetts Institute of Technology, Physics, Massachusetts Institute of Technology, MIT

  • Connor Hart

    Physics, Harvard University, Harvard University

  • Matthew J Turner

    Physics, Harvard University, Harvard University

  • Patrick Jan Scheidegger

    ETH Zurich

  • Erik Bauch

    Physics, Harvard University, Harvard University

  • Ronald L Walsworth

    Harvard-Smithsonian Center for Astrophysics & Department of Physics, Harvard University & Center for Brain Science, Harvard University, Harvard University, Harvard-Smithsonian CFA, Harvard-Smithsonian CfA, Smithsonian - CFA, Harvard University