Magnetic field imaging with nitrogen-vacancy ensembles

Details Magnetic field imaging with nitrogen-vacancy ensembles Magnetic field imaging with nitrogen-vacancy ensembles

Apr 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011njph...13d5021p&link_type=abstract

New Journal of Physics, Volume 13, Issue 4, pp. 045021 (2011).

Physics

5

Scientific paper

We demonstrate a method of imaging spatially varying magnetic fields using a thin layer of nitrogen-vacancy (NV) centers at the surface of a diamond chip. Fluorescence emitted by the two-dimensional NV ensemble is detected by a CCD array, from which a vector magnetic field pattern is reconstructed. As a demonstration, ac current is passed through wires placed on the diamond chip surface, and the resulting ac magnetic field patterns are imaged using an echo-based technique with sub-micron resolution over a 140 μm×140 μm field of view, giving single-pixel sensitivity \sim100\,nT/\sqrt{Hz} . We discuss ongoing efforts to further improve the sensitivity, as well as potential bioimaging applications such as real-time imaging of activity in functional, cultured networks of neurons.

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