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

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Title
Multi-millijoule terahertz emission from laser-wakefield-accelerated electrons
Author(s)
Taegyu Pak; Mohammad Rezaei-Pandari; Sang Beom Kim; Geonwoo Lee; Dae Hee Wi; Calin Ioan Hojbota; Mohamaad Mirzaie; Kim, Hyungmun; Jae Hee Sung; Seong Ku Lee; Kang, Chul; Ki-Yong Kim
Publication Date
2023-02
Journal
Light: Science and Applications, v.12, no.1, pp.1 - 11
Publisher
Springer Nature
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. © 2023, The Author(s).
URI
https://pr.ibs.re.kr/handle/8788114/13108
DOI
10.1038/s41377-022-01068-0
ISSN
2095-5545
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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