关联电子动力学对分子轨道的依赖及其强场控制研究

项目名称： 关联电子动力学对分子轨道的依赖及其强场控制研究

项目编号： No.61475132

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 余本海

作者单位： 信阳师范学院

项目金额： 70万元

中文摘要： 强场原子、分子非次序双电离中的电子对表现出很强的关联效应，因而开展强场双电离研究有助于人们更加直观和深入的认识微观动力学过程的物理本质。最新的研究表明，强场分子电离过程发射出来的电子信号中携带有丰富的目标分子的结构信息，对这些电子信号进行分析和调控，不但有望实现对关联电子发射的控制，还能实现对目标分子轨道结构的探测。因此，本项目拟利用数值求解含时薛定谔方程量子理论开展超强激光驱动下分子非次序双电离电子关联特性研究。首先研究分子结构对阿秒时间尺度的电子碰撞动力学行为的影响，获得不同轨道结构分子的关联电子电离动力学。随后探索轨道依赖的电子关联与分子核间距、分子取向、激光波长、强度及载波包络相位等的依赖特性，揭示电离动力学对分子轨道依赖的物理本质。最后根据回复电子波包与分子轨道的依赖特性，利用双色场约束并分离单电离电子波包的角分布，通过控制再碰撞概率实现对关联电子动力学的精确操控。

中文关键词： 非次序双电离；电子关联；超快动力学控制

英文摘要： As the non-sequential double ionization (NSDI) of atoms and molecules involves the correlated motion of two electrons, to carry out the investigation on the strong-field NSDI will benefit people to realize the physical essence of the physical processes in the microscopic world more directly and clearly. The recent investigation has demonstrated that, by initiating the ultrafast strong-filed ionization processes of the molecule with an ultrafast laser pulse, the emitted electronic signal carries abundant structural information about the molecular orbital of the detected molecule. Therefore, the ultrafast dynamics control of electron and the structural detection of the molecular orbital can be achieved by analyzing and manipulative electron dynamics. This project intends to study strong-field NSDI of molecules by solving the time-dependent Schr?dinger equation. Firstly, we investigate the atto-second collision dynamics of correlated electrons from NSDI varying the molecular structure and demonstrate the electron correlation for different molecular orbitals. Then we explore the dependence of the molecular NSDI on the internuclear distance, molecular orientation, wavelength, intensity and carrier-envelope phase. We analyze the physical nature of these dependences. Finally, on the basis of preceding researches, we study the manipulating and controlling of the correlated electron dynamics of molecules using the two-color laser fields via recollision probability of the returned electronic wave packet.

英文关键词： non-sequential double ionization;electron correlation;ultrafast dynamics control