中国物理B ›› 2025, Vol. 34 ›› Issue (10): 105201-105201.doi: 10.1088/1674-1056/add67a

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Pulse interval tunable terahertz radiation from electron beam-plasma interactions

Die Jian(简蝶)1, Jie Cai(蔡杰)2, Li-Qi Han(韩立琦)1, Xing-Yu Zhao(赵兴宇)1, Han Wen(温寒)1,†, and Jin-Qing Yu(余金清)1   

  1. 1 Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications, School of Physics and Electronics, Hunan University, Changsha 410082, China;
    2 State Key Laboratory of Nuclear Physics and Technology, Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
  • 收稿日期:2025-03-19 修回日期:2025-04-24 接受日期:2025-05-09 发布日期:2025-10-11
  • 通讯作者: Han Wen E-mail:hwen@hnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12175058) and the National Science Fund of Hunan Province for Distinguished Young Scholars (Grant No. 2024JJ2009).

Pulse interval tunable terahertz radiation from electron beam-plasma interactions

Die Jian(简蝶)1, Jie Cai(蔡杰)2, Li-Qi Han(韩立琦)1, Xing-Yu Zhao(赵兴宇)1, Han Wen(温寒)1,†, and Jin-Qing Yu(余金清)1   

  1. 1 Hunan Provincial Key Laboratory of High-Energy Scale Physics and Applications, School of Physics and Electronics, Hunan University, Changsha 410082, China;
    2 State Key Laboratory of Nuclear Physics and Technology, Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
  • Received:2025-03-19 Revised:2025-04-24 Accepted:2025-05-09 Published:2025-10-11
  • Contact: Han Wen E-mail:hwen@hnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12175058) and the National Science Fund of Hunan Province for Distinguished Young Scholars (Grant No. 2024JJ2009).

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摘要： Terahertz (THz) radiation is rapidly emerging as a powerful tool with diverse applications, including high-speed imaging, laser-driven particle acceleration, and ultra-high frequency (UHF) communications. However, generating multi-pulse THz radiation with controllable time intervals remains a significant challenge. This study presents an approach to overcome this hurdle by exploiting the interaction between an electron beam and plasma. Using numerical simulations and theoretical analysis, we investigated the behavior of an electron beam within a plasma and its interaction with the longitudinal sheath field. This interaction resulted in the generation of multiple distinct THz pulses. We demonstrated that the plasma length adjustment allows for precise tuning of the interval between THz pulses. Moreover, the radiation intensity could be controlled by the electron beam energy and the electron bunch duration. The proposed scheme can generate multi-pulse THz radiation in a flexible and precise manner, paving the way for advancements in applications requiring high temporal resolution.

关键词: electron beam, plasma, terahertz, particle-in-cell simulation

Abstract: Terahertz (THz) radiation is rapidly emerging as a powerful tool with diverse applications, including high-speed imaging, laser-driven particle acceleration, and ultra-high frequency (UHF) communications. However, generating multi-pulse THz radiation with controllable time intervals remains a significant challenge. This study presents an approach to overcome this hurdle by exploiting the interaction between an electron beam and plasma. Using numerical simulations and theoretical analysis, we investigated the behavior of an electron beam within a plasma and its interaction with the longitudinal sheath field. This interaction resulted in the generation of multiple distinct THz pulses. We demonstrated that the plasma length adjustment allows for precise tuning of the interval between THz pulses. Moreover, the radiation intensity could be controlled by the electron beam energy and the electron bunch duration. The proposed scheme can generate multi-pulse THz radiation in a flexible and precise manner, paving the way for advancements in applications requiring high temporal resolution.

Key words: electron beam, plasma, terahertz, particle-in-cell simulation

中图分类号:  (Particle beam interactions in plasmas)

  • 52.40.Mj
52.59.-f (Intense particle beams and radiation sources) 52.65.Rr (Particle-in-cell method) 52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?)