Multi-millijoule terahertz emission from laser-wakefield-accelerated electrons

Taegyu Pak; Mohammad Rezaei-Pandari; Sang Beom Kim; Mohammad Rezaei-Pandari; Dae Hee Wi; Calin Ioan Hojbota; Mohammad Mirzaie; Hyeongmun Kim; Jae Hee Sung; Seong Ku Lee; Chul Kang; Ki-Yong Kim

doi:10.1038/s41377-022-01068-0

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Multi-millijoule terahertz emission from laser-wakefield-accelerated electrons

Original Articles

- Multi-millijoule terahertz emission from laser-wakefield-accelerated electrons
- Light: Science & Applications Vol. 12, Issue 2, Pages: 248-258(2023)
- Affiliations：
  
  1.Center for Relativistic Laser Science, Institute for Basic Science, Gwangju, 61005, Korea
  2.Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Korea
  3.Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
  4.Advanced Photonics Research Institute, GIST, Gwangju, 61005, Korea
  5.Institute for Research in Electronics and Applied Physics and Department of Physics, University of Maryland, College Park, Maryland, 20742, USA
- Author bio：
  
  Ki-Yong Kim (kykim@umd.edu)
- Funds：
- DOI：10.1038/s41377-022-01068-0
  CLC：
- Published：28 February 2023，
  
  Published Online：6 February 2023，
  
  Received：12 July 2022，
  
  Revised：11 December 2022，
  
  Accepted：28 December 2022
Scan for full text
Pak, T. et al. Multi-millijoule terahertz emission from laserwakefield-accelerated electrons. Light: Science & Applications, 12, 248-258 (2023).
DOI：

Pak, T. et al. Multi-millijoule terahertz emission from laserwakefield-accelerated electrons. Light: Science & Applications, 12, 248-258 (2023). DOI： 10.1038/s41377-022-01068-0.

摘要

Abstract

High-power terahertz radiation was observed to be emitted from a gas jet irradiated by 100-terawatt-class laser pulses in the laser-wakefield acceleration of electrons. The emitted terahertz radiation was characterized in terms of its spectrum

polarization

and energy dependence on the accompanying electron bunch energy and charge under various gas target conditions. With a nitrogen target

more than 4 mJ of energy was produced at < 10 THz with a laser-to-terahertz conversion efficiency of ~0.15%. Such strong terahertz radiation is hypothesized to be produced from plasma electrons accelerated by the ponderomotive force of the laser and the plasma wakefields on the time scale of the laser pulse duration and plasma period. This model is examined with analytic calculations and particle-in-cell simulations to better understand the generation mechanism of high-energy terahertz radiation in laser-wakefield acceleration.

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Keywords

references

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