Dynamic nuclear polarization enhanced magnetic field sensitivity and decoherence spectroscopy of an ensemble of near-surface nitrogen-vacancy centers in diamond

Kento Sasaki, Ed E. Kleinsasser, Zhouyang Zhu, Wen Di Li, Hideyuki Watanabe, Kai Mei C. Fu, Kohei M Itoh, Eisuke Abe

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Abstract

We perform pulsed optically detected electron spin resonance to measure the DC magnetic field sensitivity and electronic spin coherence time T2 of an ensemble of near-surface, high-density nitrogen-vacancy centers engineered to have a narrow magnetic resonance linewidth. Combining pulsed spectroscopy with dynamic nuclear polarization, we obtain the photon-shot-noise-limited DC magnetic sensitivity of 35 nT Hz−0.5. We find that T2 is controlled by instantaneous diffusion, enabling decoherence spectroscopy on residual nitrogen impurity spins in the diamond lattice and a quantitative determination of their density. The demonstrated high DC magnetic sensitivity and decoherence spectroscopy are expected to broaden the application range for two-dimensional magnetic imaging.

Original languageEnglish
Article number192407
JournalApplied Physics Letters
Volume110
Issue number19
DOIs
Publication statusPublished - 2017 May 8

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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