Interaction of colliding laser pulses with gas plasma for broadband coherent terahertz wave generation  

作　　者：YUXUAN CHEN YUHANG HE LIYUAN LIU ZHEN TIAN JIANMING DAI 

机构地区：[1]Center for Terahertz Waves and School of Precision Instrument and Opto-electronics Engineering,Tianjin University,Tianjin 300072,China

出　　处：《Photonics Research》2023年第9期1562-1569,共8页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61875151,62075157);National Key Research and Development Program of China(2017YFA0701000)。

摘　　要：Colliding of two counter-propagating laser pulses is a widely used approach to create a laser field or intensity surge.We experimentally demonstrate broadband coherent terahertz(THz)radiation generation through the interaction of colliding laser pulses with gas plasma.The THz radiation has a dipole-like emission pattern perpendicular to the laser propagation direction with a detected peak electric field 1 order of magnitude higher than that by single pulse excitation.As a proof-of-concept demonstration,it provides a deep insight into the physical picture of laser–plasma interaction,exploits an important option to the promising plasma-based THz source,and may find more applications in THz nonlinear near-field imaging and spectroscopy.

关 键 词：LASER COHERENT INTERACTION 

分 类 号：O441.4[理学—电磁学]