Nitrogen vacancy centers integrated magnetometer based on multi-frequency modulation measurement technique
ISSN: 0260-2288
Article publication date: 31 December 2024
Issue publication date: 7 February 2025
Abstract
Purpose
This study aims to improve the sensitivity of magnetic detection. In this article, a multi-frequency modulation technique is used to increase the magnetic detection sensitivity of diamond nitrogen vacancy (NV) centers sensors.
Design/methodology/approach
In the field of magnetic detection, NV centers have corresponding advantages due to their unique long coherence property at room temperature. The important indicators for NV centers magnetometers are the magnetic detection sensitivity of the NV centers and the integration of the magnetometer. To solve this problem, the authors propose a multi-frequency modulated magnetic detection technique, using an integrated probe as well as a lock-in amplifier for the double enhancement of sensitivity as well as integration.
Findings
The following results can be obtained by processing and calculating the experimental data with an integrated lock-in amplifier circuit with an area of 27.50 cm2 and a probe volume of 3.12 cm3. The multi-frequency modulation technique was used to increase the magnetic detection sensitivity of the NV centers from 8.59 nT/Hz1 / 2–2.42 nT/Hz1 / 2.
Research limitations/implications
The authors propose a signal modulation technique with an integrated design, which achieves an improvement in the sensitivity of the sensor’s magnetic detection through practical testing.
Originality/value
The authors propose a signal modulation technique with an integrated design, which achieves an improvement in the sensitivity of the sensor’s magnetic detection through practical testing. This technique provides new research solution for the subsequent improvement of the magnetic detection sensitivity.
Keywords
Acknowledgements
Funding: This work was supported by the Shanxi Provincial Key Research and Shanxi Province Basic Research Program Project (Natural Science Research Top Project) under Grant 202303021221111 and the Open Project Program of Shanxi Key Laboratory of Advanced Semiconductor Optoelectronic Devices and Integrated Systems (2023SZKF25).
CRediT authorship contribution statement: Xinhui He: Schematic analysis, device design and pro-cessing, data testing, graphic production, writing original manuscripts. Kun Huang: Writing Instruction, Principle Instruction. Guihao Ran: Participation in writing. Xiaobiao Mao: Participation in device design. Qin Hu: participate in testing. Zhennan Lin: Participation in mapping. Shuangquan Ran: Participation in mapping. Tao Hu: Participation in mapping.
Citation
He, X., Huang, K., Ran, G., Mao, X., Hu, Q., Lin, Z., Ran, S. and Hu, T. (2025), "Nitrogen vacancy centers integrated magnetometer based on multi-frequency modulation measurement technique", Sensor Review, Vol. 45 No. 2, pp. 198-206. https://doi.org/10.1108/SR-10-2024-0839
Publisher
:Emerald Publishing Limited
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