Optically Detected Magnetic Resonance of Nitrogen-Vacancy Centers in Diamond under Weak Laser Excitation

• URL: http://arxiv.org/abs/2308.13351v2
• Date: Wed, 24 Apr 2024 12:21:30 GMT
• Title: Optically Detected Magnetic Resonance of Nitrogen-Vacancy Centers in Diamond under Weak Laser Excitation
• Authors: Yong-Hong Yu, Rui-Zhi Zhang, Yue Xu, Xiu-Qi Chen, Huijie Zheng, Quan Li, Ren-Bao Liu, Xin-Yu Pan, Dmitry Budker, Gang-Qin Liu,
• Abstract summary: We study optical detected magnetic resonance of NV-center ensembles under weak 532-nm laser excitation. Results are important for understanding and designing NV-based quantum sensing in light-sensitive applications.
• Score: 7.515997923464793
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: As promising quantum sensors, nitrogen-vacancy (NV) centers in diamond have been widely used in frontier studies in condensed matter physics, material sciences, and life sciences. In practical applications, weak laser excitation is favorable as it reduces the side effects of laser irradiation, for example, phototoxicity and heating. Here we report a combined theoretical and experimental study of optically detected magnetic resonance (ODMR) of NV-center ensembles under weak 532-nm laser excitation. In this regime, both the width and splitting of ODMR spectra decrease with increasing laser power. This power dependence is reproduced with a model considering laser-induced charge neutralization of NV--N+ pairs, which alters the local electric field environment. These results are important for understanding and designing NV-based quantum sensing in light-sensitive applications.

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