基于超短脉冲激光与固体靶等离子体相互作用的强场太赫兹辐射  

High-Field Terahertz Radiation Based on the Interaction Between Ultrashort Laser Pulses with Solid-Target Plasmas

作　　者：李儒博 彭晓昱 岳璋[2,3] 张宇辉 Li Rubo;Peng Xiaoyu;Yue Zhang;Zhang Yuhui(School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunication,Chongqing 400065,China;Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China;Chongqing School,University of Chinese Academy of Sciences,Chongqing 400714,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]中国科学院重庆绿色智能技术研究院,重庆400714 [3]中国科学院大学重庆学院,重庆400714

出　　处：《激光与光电子学进展》2024年第15期35-45,共11页Laser & Optoelectronics Progress

基　　金：国家重点研发计划(2017YFA0701000);国家自然科学基金委员会-中国工程物理研究院NSAF联合基金(U2030119)。

摘　　要：超短脉冲强激光与固体靶等离子体相互作用过程中可产生超宽带强场太赫兹辐射,脉冲能量从几十μJ至上百mJ以上,频谱带宽超过整个太赫兹波段,峰值电场强度可达几十MV/cm,峰值磁场强度达到几T,其辐射特性和参数取决于不同的激光参数和打靶条件,可归咎于不同的产生机制。综述了超快强激光与固体靶等离子体相互作用产生强场太赫兹波的几种主要机制或理论模型,及其涉及的几个典型实验。对这些机制的理解将有助于实现这类太赫兹辐射源的主动调控和优化,以提高能量转换效率。由于这类脉冲太赫兹辐射源峰值电场和磁场很强,在物理、化学、材料、生物医学等许多领域有许多新的潜在的重要应用。The interaction between ultrashort intense laser pulses and solid-target plasmas can generate ultrabroadband,high-field terahertz(THz)radiation with their pulse energy ranging from tens of microjoule to over 100 mJ,spectral bandwidth covering far beyond the entire THz band,peak electric field strength reaching to tens of MV/cm,and peak magnetic field strength getting to several Tesla.The characteristics and parameters of these THz radiation depend on different laser parameters and targeting conditions,which can be attributed to different generation mechanisms.In this paper,several main mechanisms or theoretical models and their typical experiments involved on the interaction of ultrafast intense lasers pulses with solid-target plasmas for generation of high-field THz radiation are reviewed.Understanding of these mechanisms will be helpful for active modulation and optimization of these THz sources to improve the energy conversion efficiency.Due to their strong peak electric and magnetic fields,these pulsed THz sources will show many important,novel potential applications in many fields such as physics,chemistry,materials,and biomedical science.

关 键 词：强场太赫兹辐射 超短脉冲激光 固体靶 等离子体 相互作用 

分 类 号：O433[机械工程—光学工程]