Probing time delay of strong-field resonant above-threshold ionization*

被引:4
作者
Xu, Shengliang [1 ,2 ]
Zhang, Qingbin [1 ,2 ]
Ran, Cheng [1 ,2 ]
Huang, Xiang [1 ,2 ]
Cao, Wei [1 ,2 ]
Lu, Peixiang [1 ,2 ,3 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
[3] Wuhan Inst Technol, Hubei Key Lab Opt Informat & Pattern Recognit, Wuhan 430205, Peoples R China
基金
中国国家自然科学基金;
关键词
above threshold ionization; resonant ionization delay; transition selection rule; ATTOSECOND; PHOTOELECTRON; PHOTOEMISSION; SCATTERING; ATOMS;
D O I
10.1088/1674-1056/abc7a5
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The high-resolution three-dimensional photoelectron momentum distributions via above-threshold ionization (ATI) of Xe atoms are measured in an intense near circularly polarized laser field using velocity map imaging and tomography reconstruction. Compared to the linearly polarized laser field, the employed near circularly polarized laser field imposes a more strict selection rule for the transition via resonant excitation, and therefore we can selectively enhance the resonant ATI through certain atomic Rydberg states. Our results show the self-reference ionization delay, which is determined from the difference between the measured streaking angles for nonadiabatic ATI via the 4f and 5f Rydberg states, is 45.6 as. Our method provides an accessible route to highlight the role of resonant transition between selected states, which will pave the way for fully understanding the ionization dynamics toward manipulating electron motion as well as reaction in an ultrafast time scale.
引用
收藏
页数:6
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