Abstract：In order to realize high-precision micro-displacement detection, the nitrogen-vacancy (NV) color center magnetometer is taken as the basis, and testing is conducted using the quantum spin regulation principle and uniform variation of spatial gradient magnetic field. Firstly, the gradient magnetic field is constructed with uniform variation by the permanent magnet, and the correlation between the magnetic field gradient and displacement is obtained. Secondly, the Ramsay sequence parameters required in the experiment is determined by testing the NV color center optical detection magnetic resonance (ODMR) frequency points and determining the quantum flip period corresponding to the Rabi oscillation in the time domain. Finally, the correlation of fluorescence intensity and magnetic field gradient is completed based on the Ramsey magnetic field measurement principle. The relationship between fluorescence intensity and micro-displacement change is obtained, and the micro-displacement measurement is realized. The minimum resolution of displacement is about 104nm.
李中豪,刘雨奇,张浩,刘鑫,张家璇. 量子自旋调控的微位移检测系统设计与测量[J]. 计量学报, 2024, 45(4): 465-470.
LI Zhonghao,LIU Yuqi,ZHANG Hao,LIU Xin,ZHANG Jiaxuan. Design and Measurement of Micro-displacement Detection System Based on Solid State Quantum Spin Regulation. Acta Metrologica Sinica, 2024, 45(4): 465-470.
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2024, Vol. 45 
