Diamond quantum magnetometer with dc sensitivity of < 10 pT Hz$^{-1/2}$ toward measurement of biomagnetic field
| Autor: | Sekiguchi, N., Fushimi, M., Yoshimura, A., Shinei, C., Miyakawa, M., Taniguchi, T., Teraji, T., Abe, H., Onoda, S., Ohshima, T., Hatano, M., Sekino, M., Iwasaki, T. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Phys. Rev. Applied 21, 064010 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.21.064010 |
| Popis: | We present a sensitive diamond quantum sensor with a magnetic field sensitivity of $9.4 \pm 0.1~\mathrm{pT/\sqrt{Hz}}$ in a near-dc frequency range of 5 to 100~Hz. This sensor is based on the continuous-wave optically detected magnetic resonance of an ensemble of nitrogen-vacancy centers along the [111] direction in a diamond (111) single crystal. The long $T_{2}^{\ast} \sim 2~\mathrm{\mu s}$ in our diamond and the reduced intensity noise in laser-induced fluorescence result in remarkable sensitivity among diamond quantum sensors. Based on an Allan deviation analysis, we demonstrate that a sub-picotesla field of 0.3~pT is detectable by interrogating the magnetic field for a few thousand seconds. The sensor head is compatible with various practical applications and allows a minimum measurement distance of about 1~mm from the sensing region. The proposed sensor facilitates the practical application of diamond quantum sensors. Comment: 8 pages, 5 figures |
| Databáze: | arXiv |
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