Wide-field diamond magnetometry with millihertz frequency resolution and nanotesla sensitivity

Wide-field quantum magnetometry using nitrogen-vacancy (NV) center in diamond can be a breakthrough for a nuclear magnetic resonance (NMR) in a small volume, which is important for biological applications. Although the coherence time of the electron spin of the NV center results in a limited frequen...

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Veröffentlicht in:AIP advances 2018-12, Vol.8 (12), p.125316-125316-7
Hauptverfasser: Mizuno, Kosuke, Nakajima, Makoto, Ishiwata, Hitoshi, Masuyama, Yuta, Iwasaki, Takayuki, Hatano, Mutsuko
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Sprache:eng
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Zusammenfassung:Wide-field quantum magnetometry using nitrogen-vacancy (NV) center in diamond can be a breakthrough for a nuclear magnetic resonance (NMR) in a small volume, which is important for biological applications. Although the coherence time of the electron spin of the NV center results in a limited frequency resolution for diamond magnetometry in the range 10–100 kHz, recent studies have shown that a phase-sensitive protocol can circumvent this limit using a confocal setup. We proposed a new measurement protocol, “iQdyne,” which facilitates an improved frequency resolution of wide-field imaging, unencumbered by the coherence limit imposed by the NV center. We demonstrated wide-field magnetometry with a frequency resolution of 238 mHz and a magnetic sensitivity of 65 nT/Hz1/2, which are superior to those obtained using a conventional XY8-based technique, and showed the potential of the iQdyne protocol for the wide-field NMR imaging.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.5048265