信阳师范大学学报（自然科学版）2025，Vol.38Issue(4)：437-442,6.DOI:10.3969/j.issn.2097-583X.2025.04.009
双色场操控下氩原子单电离超快动力学研究
Ultrafast dynamics of Argon single ionization driven by two-color laser fields
摘要
Abstract
The photoelectron momentum distribution resulting from the single ionization of atoms driven by two-color laser fields was investigated.By adjusting the crossing angle and relative phase of the two-color fields,the effective control over the emission direction of photoelectrons was achieved.Experimentally,photoelectron momentum distributions were measured using a cold target recoil ion momentum spectroscopy(cold target recoil ion momentum spectroscopy(COLTRIMS))setup under linearly polarized 800 nm+400 nm two-color laser fields with varying crossing angles and relative phases.The results showed that,with increasing crossing angle,the principal axis of the momentum distribution tilted,the tilt angle was approximately equal to half of the crossing angle.Moreover,periodic oscillations in the momentum distribution between the second and fourth quadrants were observed as the relative phase varied.Theoretically,a classical ensemble model incorporating the Heisenberg potential was employed to simulate the experimental results,revealing relationships between the emission direction of photoelectrons and the ionization time delay.It was found that increasing the crossing angle confined electron emission to within a single optical cycle,and that intracycle interference significantly altered photoelectron trajectories.These combined experimental and theoretical findings demonstrated that both the crossing angle and relative phase of the two-color fields could be used synergistically to precisely control the angular distribution and symmetry of photoelectron emission.关键词
超快光学/隧穿电离/双色激光场/光电子动量谱/电离操控Key words
ultrafast optics/tunneling ionization/two-color laser fields/photoelectron momentum distribution/ionization control分类
数理科学引用本文复制引用
陈红梅,吴凤润,李整法,汤清彬..双色场操控下氩原子单电离超快动力学研究[J].信阳师范大学学报（自然科学版）,2025,38(4):437-442,6.基金项目
国家自然科学基金项目(12074329) （12074329）
河南省自然科学基金面上项目(252300420347) （252300420347）
信阳师范大学"南湖学者奖励计划"青年项目 （）
