Author Affiliations
Abstract
1 School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
2 Laboratory of Optical Information Technology, Wuhan Institute of Technology, Wuhan 430205, China
Using the classical-trajectory Monte Carlo model, we have theoretically studied the angular momentum distribution of frustrated tunneling ionization (FTI) of atoms in strong laser fields. Our results show that the angular momentum distribution of the FTI events exhibits a double-hump structure. With this classical model, we back traced the tunneling coordinates, i.e., the tunneling time and initial transverse momentum at tunneling ionization. It is shown that for the events tunneling ionized at the rising edge of the electric field, the final angular momentum exhibits a strong dependence on the initial transverse momentum at tunneling. While for the events ionized at the falling edge, there is a relatively harder recollision between the returning electron and the parent ion, leading to the angular momentum losing the correlation with the initial transverse momentum. Our study suggests that the angular momentum of the FTI events could be manipulated by controlling the initial coordinates of the tunneling ionization.
020.2649 Strong field laser physics 020.4180 Multiphoton processes 320.7110 Ultrafast nonlinear optics Chinese Optics Letters
2018, 16(4): 040202
1 武汉光电国家实验室华中科技大学光电子科学与工程学院, 湖北 武汉 430074
2 湖北第二师范学院物理与电子信息学院, 湖北 武汉 430205
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文字间用 号隔开空半格正交双色场 碰撞角 碰撞动量 相关动量谱 orthogonal two-color laser pulses recollision angle recollision momentum correlated momentum distribution
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