中国物理B ›› 2025, Vol. 34 ›› Issue (7): 70701-070701.doi: 10.1088/1674-1056/adce95

所属专题： Featured Column — INSTRUMENTATION AND MEASUREMENT

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High-sensitivity spectroscopic measurements under pulsed high magnetic field

Zheng Wang(王政)1, Yichun Pan(潘议淳)1, Guangran Yang(杨光冉)1, Wei Xie(谢微)2, and Weihang Zhou(周伟航)1,†   

  1. 1 Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
    2 State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
  • 收稿日期:2025-01-20 修回日期:2025-04-09 接受日期:2025-04-21 出版日期:2025-06-18 发布日期:2025-06-18
  • 通讯作者: Weihang Zhou E-mail:zhouweihang@hust.edu.cn
  • 基金资助:
    This work was financially supported by the National Key Research and Development Program of China (Grant No. 2022YFA1602700) and the National Natural Science Foundation of China (Grant No. 12274159).

High-sensitivity spectroscopic measurements under pulsed high magnetic field

Zheng Wang(王政)1, Yichun Pan(潘议淳)1, Guangran Yang(杨光冉)1, Wei Xie(谢微)2, and Weihang Zhou(周伟航)1,†   

  1. 1 Wuhan National High Magnetic Field Center and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
    2 State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
  • Received:2025-01-20 Revised:2025-04-09 Accepted:2025-04-21 Online:2025-06-18 Published:2025-06-18
  • Contact: Weihang Zhou E-mail:zhouweihang@hust.edu.cn
  • Supported by:
    This work was financially supported by the National Key Research and Development Program of China (Grant No. 2022YFA1602700) and the National Natural Science Foundation of China (Grant No. 12274159).

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摘要： Pulsed magnet technology is the only way to generate ultra-strong magnetic fields higher than 45 T so far. However, the inherently fast-changing field strength (typically on the order of 1000 T/s) poses significant challenges for spectroscopic measurements which rely on time integration of signals to improve spectral qualities. In this work, we report high-sensitivity spectroscopic measurements under pulsed high magnetic fields employing the long flat-top pulsed magnetic field technique. By means of a multiple-capacitor power supply, we were able to generate pulsed high magnetic fields with controllable flat-top pulse width and field stabilities. By synchronizing spectroscopic measurements with the waveform of the flat-top magnetic field, the integration time of each spectrum can be increased by up to 100 times compared with that of the conventional spectroscopic measurements under pulsed magnetic fields, thus enabling high-sensitivity spectroscopic measurements under ultra-strong pulsed magnetic fields. These findings promise an efficient way to significantly improve the performance and extend the application of optical measurements under pulsed high magnetic fields.

关键词: pulsed magnet, flat-top pulsed magnetic field, optical spectroscopy, photoluminescence

Abstract: Pulsed magnet technology is the only way to generate ultra-strong magnetic fields higher than 45 T so far. However, the inherently fast-changing field strength (typically on the order of 1000 T/s) poses significant challenges for spectroscopic measurements which rely on time integration of signals to improve spectral qualities. In this work, we report high-sensitivity spectroscopic measurements under pulsed high magnetic fields employing the long flat-top pulsed magnetic field technique. By means of a multiple-capacitor power supply, we were able to generate pulsed high magnetic fields with controllable flat-top pulse width and field stabilities. By synchronizing spectroscopic measurements with the waveform of the flat-top magnetic field, the integration time of each spectrum can be increased by up to 100 times compared with that of the conventional spectroscopic measurements under pulsed magnetic fields, thus enabling high-sensitivity spectroscopic measurements under ultra-strong pulsed magnetic fields. These findings promise an efficient way to significantly improve the performance and extend the application of optical measurements under pulsed high magnetic fields.

Key words: pulsed magnet, flat-top pulsed magnetic field, optical spectroscopy, photoluminescence

中图分类号:  (Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques)

  • 07.57.Pt
07.55.-w (Magnetic instruments and components) 07.55.Db (Generation of magnetic fields; magnets)