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.
出处
《激光与光电子学进展》
CSCD
北大核心
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)。
