红外与毫米波学报2023，Vol.42Issue(6)：789-795,7.DOI:10.11972/j.issn.1001-9014.2023.06.012
基于少周期激光脉冲与气体等离子体作用的太赫兹到中红外超宽带辐射产生
From terahertz to mid-infrared ultra-broadband radiation generated from few-cycle laser pulse interaction with gas plasma filament
摘要
Abstract
The strong few-cycle laser pulse interaction with the gas plasma filament can generate strong and broad-band terahertz radiation.Here,we investigate the detail of plasma current and its terahertz radiation produced by the few-cycle laser pulse interaction with the gas plasma based on the calculations.The ionization during the plas-ma filamentation is in the transition between the tunnel ionization and the multiphoton ionization.The results show that this scheme can generate ultra-broadband radiation from the range of terahertz to mid-infrared,and its amplitude is a periodic function of the carrier-envelope phase of the few-cycle laser pulse.The frequency of the terahertz pulse is determined by the duration of the laser pulse,the time evolution of ionization and the plasma cur-rent,rather than by the density of the plasma.This work might give a useful clue to carry out the experiment of ul-tra-broadband terahertz generation by the few-cycle laser pulse interaction with the gas plasma filament.关键词
太赫兹/中红外/少周期激光脉冲/气体等离子体/相位演化Key words
terahertz/mid-infrared/few-cycle laser pulse/gas plasma/phase evolution分类
数理科学引用本文复制引用
杜海伟,王婧仪,孙长明,李强爽..基于少周期激光脉冲与气体等离子体作用的太赫兹到中红外超宽带辐射产生[J].红外与毫米波学报,2023,42(6):789-795,7.基金项目
Supported by the National Natural Science Foundation of China(12064028) （12064028）
Jiangxi Provincial Natural Science Foundation(20232BAB201045) （20232BAB201045）
and Open Foundation of Key Laboratory of Nondestructive Testing Technology(Ministry of Education)(EW202108218) （Ministry of Education）
