组合激光场中原子和负离子阈上电离性质的理论研究

The above-threshold ionization (ATI) nature of the atoms (H,Ne,Ar and Xe) and the nagative ions (H-,F-,Cl-,Br- and I-) in the combined laser fields are studied using numerically solving the time-dependent Schr?dinger equation combined the window operator technique method in this project. The photoelectron two-dimensional momentum distributions and the energy spectra are theoretically calculated by optimizing the laser parameters of the combined laser fields. The above-threshold ionization mechanism of the atoms and the nagative ions in the combined laser fields are revealed and how to chang and control the electron movement is explored.The project can provide a new effective method for the ATI study of atoms and nagative ions in the combined laser fields.It can not only further understand their ATI behavior in the combined laser fields,and have important significance for the new type particle accelerator, attosecond physics and measurements of atomic structure and so on.

本项目拟利用数值求解含时薛定谔方程结合窗算符技术方法研究原子（H、 Ne、 Ar和Xe）和负离子（H-、 F-、Cl-、Br-和I-）在组合激光场中阈上电离性质。通过优化组合激光场的激光参数，理论计算这些原子和负离子的光电子二维动量分布和能量谱，揭示它们在组合激光场中阈上电离的电离机制，探究如何改变和控制组合激光场中电离光电子的运动。本项目能够为研究组合激光场中原子和负离子阈上电离性质提供一种有效的新方法，不仅能进一步理解它们在组合激光场中阈上电离性质，而且对于新型粒子加速器、阿秒物理和测量原子结构等领域都有重要意义。

本项目主要研究原子（H、 Ne、 Ar 和Xe）和负离子（H-、 F-、Cl-、Br-和I-）在组合激光场中阈上电离性质。我们提出了利用数值求解含时薛定谔方程结合窗算符技术方法研究原子和负离子在强激光场中阈上电离的性质。在优化组合激光场的激光参数后，通过计算这些原子和负离子的光电子二维动量分布和能量谱，给出了所研究的原子和负离子在组合激光场中阈上电离的电离机制及改变和控制组合激光场中电离光电子的运动的方法。此外，我们还利用强场近似方法研究了原子和负离子在强激光场中的阈上电离的性质。