Nitrogen-vacancy ensemble magnetometry based on pump absorption

Article

关键词: DIAMOND WAVE-GUIDE;    CENTERS;    SPECTROSCOPY;    PHYSICS;    SPINS;    CELL;   

DOI  :  10.1103/PhysRevB.97.024105

来源: SCIE

【 摘 要 】

We demonstrate magnetic-field sensing using an ensemble of nitrogen-vacancy centers by recording the variation in the pump-light absorption due to the spin-polarization dependence of the total ground-state population. Using a 532 nm pump laser, we measure the absorption of native nitrogen-vacancy centers in a chemical-vapor-deposited diamond placed in a resonant optical cavity. For a laser pump power of 0.4 W and a cavity finesse of 45, we obtain a noise floor of similar to 100 nT/root Hz spanning a bandwidth up to 125 Hz. We project a photon shot-noise-limited sensitivity of similar to 1 pT/root Hz by optimizing the nitrogen-vacancy concentration and the detection method.

【 授权许可】

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