# Magnetic Field Imaging with Nitrogen-Vacancy Ensembles

 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. Full Text & Related Files: Pham_MagneticField.pdf (1.611Mb; PDF) 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 Other Sources: http://walsworth.physics.harvard.edu/publications/2011_Pham_NJP.pdf Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:9949242

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