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  • Received: Apr. 26, 2020

    Accepted: Jun. 23, 2020

    Posted: Jul. 15, 2020

    Published Online: Jul. 16, 2020

    The Author Email: Yang Dong (dongy13@ustc.edu.cn)

    DOI: 10.3788/COL202018.080201

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    Bowen Zhao, Yang Dong, Shaochun Zhang, Xiangdong Chen, Wei Zhu, Fangwen Sun. Improving the NV generation efficiency by electron irradiation[J]. Chinese Optics Letters, 2020, 18(8): 080201

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Chinese Optics Letters, Vol. 18, Issue 8, 080201 (2020)

Improving the NV generation efficiency by electron irradiation

Bowen Zhao1,2, Yang Dong1,2,*, Shaochun Zhang1,2, Xiangdong Chen1,2, Wei Zhu3, and Fangwen Sun1,2

Author Affiliations

  • 1CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • 2CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China
  • 3Hefei National Laboratory for Physical Science at Microscale, Department of Physics, University of Science and Technology of China, Hefei 230026, China

Abstract

The nitrogen vacancy (NV) center in diamond has been well applied in quantum sensing of electromagnetic field and temperature, where the sensitivity can be enhanced by the number of NV centers. Here, we used electron beam irradiation to increase the generation rate of NV centers by nearly 22 times. We systematically studied the optical and electronic properties of the NV center as a function of an electron irradiation dose, where the detection sensitivity of magnetic fields was improved. With such samples with dense NV centers, a sub-pico-Tesla sensitivity in magnetic fields detection can be achieved with optimal controls and detections.

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