Vector magnetometry in zero bias magnetic field using nitrogen-vacancy ensembles

李春兴 ¹石发展 ²周经纬 ²王鹏飞²

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作者信息

1. CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China
2. CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China
折叠

Abstract

The application of the vector magnetometry based on nitrogen-vacancy(NV)ensembles has been widely investigated in multiple areas.It has the superiority of high sensitivity and high stability in ambient conditions with microscale spatial resolution.However,a bias magnetic field is necessary to fully separate the resonance lines of optically detected magnetic resonance(ODMR)spectrum of NV ensembles.This brings disturbances in samples being detected and limits the range of application.Here,we demonstrate a method of vector magnetometry in zero bias magnetic field using NV ensembles.By utilizing the anisotropy property of fluorescence excited from NV centers,we analyzed the ODMR spectrum of NV ensembles under various polarized angles of excitation laser in zero bias magnetic field with a quantitative numerical model and reconstructed the magnetic field vector.The minimum magnetic field modulus that can be resolved accurately is down to～0.64 G theoretically depending on the ODMR spectral line width(1.8 MHz),and～2 G experimentally due to noises in fluorescence signals and errors in calibration.By using 13C purified and low nitrogen concentration diamond combined with improving calibration of unknown parameters,the ODMR spectral line width can be further decreased below 0.5 MHz,corresponding to～0.18 G minimum resolvable magnetic field modulus.

Key words

vector magnetometry/NV ensembles/optically detected magnetic resonance(ODMR)/zero bias magnetic field

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基金项目

National Key R&D Program of China(2021YFB3202800)

National Key R&D Program of China(2023YF0718400)

Chinese Academy of Sciences(ZDZBGCH2021002)

Chinese Academy of Sciences(GJJSTD20200001)

Innovation Program for Quantum Science and Technology(2021ZD0303204)

Anhui Initiative in Quantum Information Technologies,USTC Tang Scholar()

Fundamental Research Funds for the Central Universities()

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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