Carrier-Envelope Phase-Dependent Phase Matching of Terahertz Emission in Laser Plasma  

作　　者：Wang Shuo Li Fangshu Lu Haocheng Zheng Wenyang Zhao Xulin Jiang Yang Li Na Bai Ya Liu Peng 

机构地区：[1]State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-Intense Laser Science,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]China MOE Key Laboratory of Advanced Micro-Structured Materials,Institute of Precision Optical Engineering,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China [4]Department of Physics,Shanghai University,Shanghai 200444,China [5]School of Physics and Electronic Engineering,Xinxiang University,Xinxiang 453003,Henan,China

出　　处：《激光与光电子学进展》2023年第7期424-429,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11874373,2174412);中国科学院科研仪器设备研制项目(YJKYYQ20180023);河南省自然科学基金(202300410017);新乡学院博士科研启动项目(1366020150)。

摘　　要：We investigate off-axis phase-matched terahertz(THz)radiation in laser plasma pumped by few-cycle laser pulses.We find that the THz amplitude and angular distributions in the far field are sensitively dependent on the pump pulse’s focal carrier-envelope phase(CEP).Ring-like profiles of THz radiation are obtained at CEP values of 0.5πand 1.5π,due to the inversely symmetric local THz waveforms emitted before and after laser focus.Off-axis phase-matched THz radiation offers a tool to accurately measure the CEP of few-cycle pulses at the center of a medium.

关 键 词：terahertz radiation carrier-envelope phase laser plasma off-axis phase-matching 

分 类 号：O437.5[机械工程—光学工程]