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
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作者单位:

1.南昌航空大学 无损检测技术教育部重点实验室,江西 南昌 330063;2.南昌航空大学 测试与光电工程学院,江西 南昌 330063

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O434.3

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From terahertz to mid-infrared ultra-broadband radiation generated from few-cycle laser pulse interaction with gas plasma filament
Author:
Affiliation:

1.Key Laboratory of Nondestructive Testing (Ministry of Education), Nanchang Hangkong University, Nanchang 330063, China;2.School of Measuring and Optical Engineering, Nanchang Hangkong University, Nanchang 330063, China

Fund Project:

Supported by the National Natural Science Foundation of China (12064028); Jiangxi Provincial Natural Science Foundation (20232BAB201045); and Open Foundation of Key Laboratory of Nondestructive Testing Technology (Ministry of Education) (EW202108218)

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    摘要:

    超强少周期激光脉冲与气体等离子体作用可以产生强的宽带太赫兹脉冲辐射。本文以数值计算为主要工具研究了少周期激光脉冲与气体等离子体成丝作用产生的等离子体电流及对应的太赫兹辐射特性。该过程中的等离子体电离处于多光子电离和隧道电离的过渡阶段。结果显示,该机制能够产生从太赫兹到中红外的超宽带辐射,且辐射的电场振幅是少周期激光脉冲载波相位的周期函数。太赫兹脉冲由激光脉冲脉宽和等离子体电离的时间演化确定,而不是由等离子体密度决定。本文为基于少周期激光脉冲与气体等离子体作用产生超宽带太赫兹辐射的实验提供了一定的理论参考。

    Abstract:

    The strong few-cycle laser pulse interaction with the gas plasma filament can generate strong and broadband 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 plasma 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 current, rather than by the density of the plasma. This work might give a useful clue to carry out the experiment of ultra-broadband terahertz generation by the few-cycle laser pulse interaction with the gas plasma filament.

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引用本文

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):788~794]. DU Hai-Wei, WANG Jing-Yi, SUN Chang-Ming, LI Qiang-Shuang. From terahertz to mid-infrared ultra-broadband radiation generated from few-cycle laser pulse interaction with gas plasma filament[J]. J. Infrared Millim. Waves,2023,42(6):788~794.]

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历史
  • 收稿日期:2023-03-02
  • 最后修改日期:2023-11-03
  • 录用日期:2023-05-08
  • 在线发布日期: 2023-11-03
  • 出版日期: