Magnetic field imaging with nitrogen-vacancy ensembles
Part of Focus on Diamond-Based Photonics and Spintronics 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, f...
| Main Authors: | , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Institute of Physics
2011
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| Online Access: | http://hdl.handle.net/1721.1/65850 https://orcid.org/0000-0003-3207-594X |
| Summary: | Part of Focus on Diamond-Based Photonics and Spintronics
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\,{\rm nT}/\sqrt{{\rm 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.
PACS
61.72.J- Point defects and defect clusters
78.55.Hx Other solid inorganic materials
87.50.C- Static and low-frequency electric and magnetic fields effects
85.30.Tv Field effect devices
Subjects
Electronics and devices
Condensed matter: electrical, magnetic and optical
Semiconductors
Medical physics
Biological physics
Condensed matter: structural, mechanical & thermal |
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