中国物理B ›› 2021, Vol. 30 ›› Issue (3): 30701-.doi: 10.1088/1674-1056/abc2b9

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  • 收稿日期:2020-08-19 修回日期:2020-09-30 接受日期:2020-10-20 出版日期:2021-02-22 发布日期:2021-02-22

Atomic magnetometer with microfabricated vapor cells based on coherent population trapping

Xiaojie Li(李晓杰)1,2,3, Yue Shi(史越)1,2,3, Hongbo Xue(薛洪波)4, Yong Ruan(阮勇)1,2,3,5,†, and Yanying Feng(冯焱颖)1,2,3,‡   

  1. 1 State Key Laboratory of Precision Measurement Technology and Instrument, Tsinghua University, Beijing 100084, China; 2 Key Laboratory of Photonic Control Technology (Ministry of Education), Tsinghua University, Beijing 100084, China; 3 Department of Precision Instrument, Tsinghua University, Beijing 100084, China; 4 State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China; 5 MEMS Institute of Zibo National High-tech Industrial Development Zone, Zibo 255086, China
  • Received:2020-08-19 Revised:2020-09-30 Accepted:2020-10-20 Online:2021-02-22 Published:2021-02-22
  • Contact: Corresponding author. E-mail: ruanyong@tsinghua.edu.cn Corresponding author. E-mail: yyfeng@tsinghua.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61473166).

Abstract: An atomic magnetometer based on coherent population trapping (CPT) resonances in microfabricated vapor cells is demonstrated. Fabricated by the micro-electro-mechanical-system (MEMS) technology, the cells are filled with Rb and Ne at a controlled pressure. An experimental apparatus is built for characterizing properties of microfabricated vapor cells via the CPT effects. The typical CPT linewidth is measured to be about 3 kHz (1.46 kHz with approximately zero laser intensity) for the rubidium D1 line at about 90 °C. The effects of pressure, temperature and laser intensity on CPT linewidth are studied experimentally. A closed-loop atomic magnetometer is finally finished with a sensitivity of 210.5 pT/Hz1/2 at 1 Hz bandwidth. This work paves the way for developing an integrated chip-scale atomic magnetometer in the future.

Key words: atomic magnetometer, MEMS, vapor cell, coherent population trapping

中图分类号:  (Magnetometers for magnetic field measurements)

  • 07.55.Ge
85.85.+j (Micro- and nano-electromechanical systems (MEMS/NEMS) and devices) 76.70.Hb (Optically detected magnetic resonance (ODMR)) 42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)