摘要
Terahertz(THz) waves could be generated through exciting a gravity-guided, free-flowing water wedge by a dual-color pulse. It is not required to rotate the optimal angle considering the water film as an ionization medium.It is demonstrated to be more effective to generate stronger THz radiation when the ionization position is on the front surface of the air water interface of the water wedge by moving its position. The effect of pulse energy on THz generation is also investigated, and it is observed that with the increase of pulse energy the THz electric field shows a quadratic rising trend. These observations are consistent with air plasma induced THz emission.
作者
李敏
李振宇
南君义
夏宇
贺明洋
王锋
卢文晖
袁帅
曾和平
Min Li;Zhenyu Li;Junyi Nan;Yu Xia;Mingyang He;Feng Wang;Wenhui Lu;Shuai Yuan;Heping Zeng(Shanghai Key Laboratory of Modern Optical System,Engineering Research Center of Optical Instrument and System,Ministry of Education,School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China)
基金
supported by the National Natural Science Foundation of China(Nos.11727812 and 61927813)
the National Key Research and Development Program of China(No.2018YFB0504400)
