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基于光丝阵列的太赫兹辐射增强方法

Method for Terahertz Radiation Enhancement Using Filament Array

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摘要

基于飞秒激光光丝阵列,从实验上实现了太赫兹(THz)辐射的增强。结果表明,使用阶跃型相位板产生光丝阵列,在相同飞秒脉冲能量下,相比于单光丝情况,光丝阵列辐射THz信号强度被增强,且THz信号强度与光丝数目成正比。当入射能量为5.8 mJ时,8根光丝时辐射的THz能量为31.73 nJ,辐射效率为5.47×10 -6。所提方法有望解决飞秒激光辐射THz过程中的能量饱和问题。

Abstract

In this study, we experimentally demonstrated the enhancement of a terahertz (THz) signal generated by a femtosecond laser-filament array in air using a simple experimental setup in which a step phase plate is used to generate multiple parallel filaments. The results show that at a given incident-femtosecond-pulse energy, compared with the case of single filament, the proposed method enhances the THz radiation intensity, and the THz radiation intensity is proportional to the number of filaments. Further, at an incident energy of 5.8 mJ, the THz energy generated by eight filaments is 31.73 nJ and the radiation efficiency is 5.47×10 -6. This simple method can be used to solve the energy saturation problem in the generation of THz radiation through femtosecond laser filamentation in air.

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中图分类号:O436

DOI:10.3788/CJL201946.0614021

所属栏目:太赫兹技术

基金项目:国家重点研发计划、国家自然科学基金、111计划、强场激光物理国家重点实验室开放课题;

收稿日期:2019-02-14

修改稿日期:2019-03-13

网络出版日期:2019-06-01

作者单位    点击查看

鲁丹:南开大学现代光学研究所, 天津 300071
苏强:南开大学现代光学研究所, 天津 300071
齐鹏飞:南开大学现代光学研究所, 天津 300071
徐强:南开大学现代光学研究所, 天津 300071
张楠:南开大学现代光学研究所, 天津 300071
林列:南开大学现代光学研究所, 天津 300071
刘伟伟:南开大学现代光学研究所, 天津 300071

联系人作者:刘伟伟(liuweiwei@nankai.edu.cn)

备注:国家重点研发计划、国家自然科学基金、111计划、强场激光物理国家重点实验室开放课题;

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引用该论文

Dan Lu,Qiang Su,Pengfei Qi,Qiang Xu,Nan Zhang,Lie Lin,Weiwei Liu. Method for Terahertz Radiation Enhancement Using Filament Array[J]. Chinese Journal of Lasers, 2019, 46(6): 0614021

鲁丹,苏强,齐鹏飞,徐强,张楠,林列,刘伟伟. 基于光丝阵列的太赫兹辐射增强方法[J]. 中国激光, 2019, 46(6): 0614021

被引情况

【1】冯世嘉,董立泉,马丹妮,吴同,张亮亮,赵跃进. 线状电极作用下等离子体产生太赫兹波的研究. 光学学报, 2020, 40(10): 1030001--1

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