Magnetic Field Imaging with Nitrogen-Vacancy Ensembles

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Magnetic Field Imaging with Nitrogen-Vacancy Ensembles

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Title: Magnetic Field Imaging with Nitrogen-Vacancy Ensembles
Author: Pham, Linh My; Le Sage, David Anthony; Stanwix, Paul L.; Yeung, Tsun Kwan; Glenn, David R.; Trifonov, Alexei; Cappellaro, Paola; Hemmer, Philip; Lukin, Mikhail D.; Park, Hongkun; Yacoby, Amir; Walsworth, Ronald L.

Note: Order does not necessarily reflect citation order of authors.

Citation: Pham, Linh M., David Le Sage, Paul L. Stanwix, Tsun K. Yeung, David R. Glenn, Alexei Trifonov, Paola Cappellaro, et al. 2011. Magnetic field imaging with nitrogen-vacancy ensembles. New Journal of Physics 13(4): 045021.
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Abstract: 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 \(140 \mu m\) x \(140 \mu m\) field of view, giving single-pixel sensitivity \(\sim 100 nT / \sqrt{Hz}\). 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.
Published Version: doi:10.1088/1367-2630/13/4/045021
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