Pulse delay effect in angular distribution of near-threshold EUV+IR two-photon ionization of Ne
Pulse delay effect in angular distribution of near-threshold EUV+IR two-photon ionization of Ne
复制标题
Ne近阈值EUV IR双光子电离角分布的脉冲延迟效应
DOI：
10.1103/physreva.89.013415
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
N. M. Kabach
中科院分区：
文献类型：
--
作者：
S. Mondal;H. Fukuzawa;K. Motomura;T. Tachibana;K. Nagaya;T. Sakai;K. Matsunami;S. Yase;M. Yao;S. Wada;H. Hayashita;N. Saito;C. Callegari;K. C. Prince;C. Miron;M. Nagasono;T. Togashi;M. Yabashi;K. L. Ishikawa;A. K. Kazansky;N. M. Kabach
从实验和理论上研究了在极紫外（EUV）自由电子激光和红外（IR）激光的飞秒脉冲联合作用下，Ne原子双光子近阈值电离产生的光电子角分布（PAD）。含时薛定谔方程的解表明，PAD强烈依赖于EUV和IR脉冲之间的时间延迟。完全重叠和非重叠脉冲的两种极端情况下获得的实验结果完全证实了预测，说明PAD的时间延迟依赖性的测量提供了一个工具，用于调查的共振和非共振路径的相对重要性的双色双光子过程中的基本问题。
Photoelectron angular distributions (PADs) from two-photon near-threshold ionization of Ne atoms by the combined action of femtosecond pulses from an extreme ultraviolet (EUV) free-electron laser and infrared (IR) laser have been studied experimentally and theoretically. Solutions of the time-dependent Schrödinger equation indicate that the PADs strongly depend on the time delay between EUV and IR pulses. The experimental results obtained for two extreme cases of completely overlapping and nonoverlapping pulses fully confirm the prediction, illustrating that the measurements of the time-delay dependence of the PAD provide a tool for investigating the fundamental problem of the relative importance of the resonant and nonresonant pathways in the two-color two-photon processes.