High-sensitivity wide-field magnetic field imaging using NV-diamond

ORAL

Abstract

We present the first implementation of wide-field magnetic imaging based on the Ramsey protocol and a high density layer of nitrogen-vacancy (NV) color centers at the surface of a diamond chip. Compared to standard CW techniques for optically detected magnetic resonance (ODMR), our pulsed implementation provides enhanced sensitivity, a higher sensing bandwidth (up to \textasciitilde 100 kHz), and better noise rejection. By extending the standard Ramsey sensing scheme with advanced quantum control methods, including sensing in the NV center's double-quantum basis \textbraceleft -1,$+$1\textbraceright and spin bath control, we significantly reduce the imager's susceptibility to inhomogeneities such as crystal-lattice strain fields and microwave gradients over of the field-of-view.

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Authors

  • Connor Hart

    Harvard, Department of Physics, Harvard University

  • Patrick Scheidegger

    Harvard/ETH Zurich, Department of Physics, ETH Zurich. Department of Physics, Harvard University., Department of Physics, ETH Zurich. Department of Physics, Harvard University

  • Erik Bauch

    Department of Physics, Harvard University

  • Jennifer Schloss

    Department of Physics, Massachusetts Institute of Technology

  • Matthew Turner

    Harvard, Department of Physics, Harvard University

  • Ronald Walsworth

    Harvard, Harvard-Smithsonian Center for Astrophysics. Department of Physics, Harvard University, Harvard University, Harvard-Smithsonian Center for Astrophysics and Department of Physics, Harvard University, Harvard-Smithsonian