Intensity-Dependent Dipole Phase in High-Order Harmonic Interferometry  

作　　者：王力 肖凡 宋盼 陶文凯 孙旭 王家灿 郑志刚 赵晶 王小伟 赵增秀 Li Wang;Fan Xiao;Pan Song;Wenkai Tao;Xu Sun;Jiacan Wang;Zhigang Zheng;Jing Zhao;Xiaowei Wang;Zengxiu Zhao(Department of Physics,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]Department of Physics,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics Letters》2023年第11期57-61,共5页中国物理快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2019YFA0307703);the National Natural Science Foundation of China(Grant Nos.12234020 and 11974426)。

摘　　要：High-order harmonics are ideal probes to resolve the attosecond dynamics of strong-field recollision processes.An easy-to-implement phase mask is utilized to covert the Gaussian beam to TEM01 transverse electromagnetic mode,allowing the realization of two-source interferometry of high-order harmonics.We experimentally measure the intensity dependence of dipole phase directly with high-order harmonic interferometry,in which the driving laser intensity can be precisely adjusted.The classical electron excursion simulations reproduce the experimental findings quite well,demonstrating that Coulomb potential plays subtle roles on movement of electrons for harmonics near the ionization threshold.This work is of great importance for precision measurements of ultrafast dynamics in strong-field physics.

关 键 词：HARMONICS INTERFEROMETRY REALIZATION 

分 类 号：O436.1[机械工程—光学工程]