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| Hauptverfasser: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2023
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| Online-Zugang: | https://arxiv.org/abs/2309.04093 |
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| _version_ | 1866917685583937536 |
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| author | 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. |
| author_facet | 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. |
| contents | 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 $T_{2}^{\ast} \sim 2~\mathrm{μs}$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_04093 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Diamond quantum magnetometer with dc sensitivity of < 10 pT Hz$^{-1/2}$ toward measurement of biomagnetic field 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. Quantum Physics Applied Physics 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 $T_{2}^{\ast} \sim 2~\mathrm{μs}$ 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. |
| title | Diamond quantum magnetometer with dc sensitivity of < 10 pT Hz$^{-1/2}$ toward measurement of biomagnetic field |
| topic | Quantum Physics Applied Physics |
| url | https://arxiv.org/abs/2309.04093 |