强激光场中阿秒时间分辨的电离动力学研究

项目名称： 强激光场中阿秒时间分辨的电离动力学研究

项目编号： No.11304018

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 叶地发

作者单位： 北京应用物理与计算数学研究所

项目金额： 30万元

中文摘要： 强激光与物质相互作用涉及原子的高剥离过程、带电粒子加速乃至超强场中的真空极化及正负电子对产生，是当今物理学的重要前沿研究领域，具有很强的基础性与探索性。强激光场中原子的电离过程是研究强激光与各种复杂物质形态相互作用的基础，展现出非微扰、多体关联主导的复杂动力学行为。这些电离过程包括多光子电离、隧穿电离、越垒电离、高阶阈上电离、非序列多重电离、自发电离、Fano共振、Auger衰变、以及原子间的库仑衰变等新奇现象，是强场物理研究的核心问题之一。本项目旨在应用量子理论、半经典轨道模拟方法结合最新实验进展，深入研究强场电离中多电子关联的阿秒超快过程。对相关问题的深入研究，有助于了解极端光场中物质微观动力学机理，为探索和操控原子分子内部阿秒尺度的电子运动及结构变化提供可借鉴的理论方案。

中文关键词： 强场电离；阿秒过程；再散射；电子关联；精密测量

英文摘要： Fundamental and exploratory research on the interaction between matter and intense laser fields, such as ionization of atoms to highly charged ions, acceleration of charged particles, vacuum polarization and electron-positron pair production in extreme strong field, have become the most significant frontier of scientific research in today's physics area. Ionization of atoms in intense laser fields is the basic physical process of the interaction between intense laser field with variety of complex physical forms, showing nonperturbative and many-body correlative complex dynamics. The study on these novel ionization processes, including multi-photon ionization, tunneling ionization, over the barrier ionization, high-order above threshold ionization, nonsequential multiple ionization, auto-ionization, Fano resonance, Auger decay, interatomic Coulomb decay, and so on, has been central to understanding and harnessing strong field physics. This project aims to apply the basic quantum theory combined with semiclassical trajectory simulation to study the attosecond ultrafast process in many-electron correlated strong field ionization dynamics. We will also try to explain the latest experiments.This kind of study will enrich our understanding about the microscopic dynamical behavior of matter in extreme laser filed, and

英文关键词： strong field ionization；attosecond process；rescattering；electron correlation；high precision measurement