Laser-Chirp Controlled Terahertz Wave Generation from Air Plasma  

作　　者：徐行 黄崟东 张喆林 刘金磊 娄菁 高明鑫 吴世有 方广有 赵增秀 陈燕萍 盛政明 常超 Xing Xu;Yindong Huang;Zhelin Zhang;Jinlei Liu;Jing Lou;Mingxin Gao;Shiyou Wu;Guangyou Fang;Zengxiu Zhao;Yanping Chen;Zhengming Sheng;and Chao Chang(Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Innovation Laboratory of Terahertz Biophysics,National Innovation Institute of Defense Technology,Beijing 100071,China;Key Laboratory of Electromagnetic Radiation and Sensing Technology,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China;Key Laboratory for Laser Plasmas,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai 200240,China;Department of Physics,College of Sciences,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China [2]Innovation Laboratory of Terahertz Biophysics,National Innovation Institute of Defense Technology,Beijing 100071,China [3]Key Laboratory of Electromagnetic Radiation and Sensing Technology,Chinese Academy of Sciences,Beijing 100190,China [4]School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [5]Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China [6]Key Laboratory for Laser Plasmas,School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China [7]Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai 200240,China [8]Department of Physics,College of Sciences,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics Letters》2023年第4期34-39,共6页中国物理快报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.12174449,12225511,T2241002,12074250,11991073,12135009,61988102,and 61971397);the National Key Research and Development Program of China (Grant Nos.2019YFA0307703 and 2018YFB2202500)。

摘　　要：We report the laser-chirp controlled terahertz(THz) wave generation from two-color-laser-induced air plasma.Our experimental results reveal that the THz wave is affected by both the laser energy and chirp,leading to radiation minima that can be quantitatively reconstructed using the linear-dipole-array model.The phase difference between the two colors,determined by the chirp and intensity of the laser,can account for the radiation minima.Furthermore,we observe an asynchronous variation in the generated THz spectrum,which suggests a THz frequency-dependent phase matching between the laser pulse and THz wave.These results highlight the importance of laser chirp during the THz wave generation and demonstrate the possibility of modulating the THz yields and spectrum through chirping the incident laser pulse.This work can provide valuable insights into the mechanism of plasma-based THz wave generation and offer a unique means to control THz emissions.

关 键 词：SPECTRUM MATCHING DIPOLE 

分 类 号：O441.4[理学—电磁学]