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Description:

Nitrogen-vacancy (NV) centers in diamonds are a powerful tool for accurate magnetic field measurements. The key is precisely estimating the field-dependent splitting width of the optically detected magnetic resonance (ODMR) spectra of the NV centers. In this study, we investigate the optical power dependence of the ODMR spectra using NV ensemble in nanodiamonds (NDs) and a single-crystal bulk diamond. We find that the splitting width exponentially decays and is saturated as the optical power increases. Comparison between NDs and a bulk sample shows that while the decay amplitude is sample-dependent, the optical power at which the decay saturates is almost sample-independent. We propose that this unexpected phenomenon is an intrinsic property of the NV center due to non-axisymmetry deformation or impurities. Our finding indicates that diamonds with less deformation are advantageous for accurate magnetic field measurements.

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• In Copyright
  

  ©2023 The Physical Society of Japan

Keyword: NVセンター, ダイヤモンド, 量子センシング

Date published: 2023-08-15

Publisher: Physical Society of Japan

Journal:

• Journal of the Physical Society of Japan (ISSN: 13474073) vol. 92 issue. 8 084701

Funding:

• 文部科学省 JPMXS0118068379, JPMXS0118067395, JP22K03524. JP19H00656, JP19H05826, JP20H02187, JP20H05661
• MEXT JPMXS0118068379), (Q-LEAP)
• JST JPMJCR1773 ( CREST )
• MIC JPMI00316 ( R&D for construction of a global quantum cryptography network)
• JST JPMJMS2062 (Moonshot R&D)

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4711

First published URL: https://doi.org/10.7566/jpsj.92.084701

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Updated at: 2024-08-31 08:30:35 +0900

Published on MDR: 2024-08-31 08:30:36 +0900