双色激光场与原子分子相互作用及相干相位控制研究

With the development of the strong laser technology in recent years, atomic and molecular scattering in laser field become a hot research field. These research can not only explore the microscopic mechanism of the laser-matter interaction, but also provide theoretical guidance for experimental studies. However, due to the laser itself has some random characteristic, such as frequency, polarization direction, pulse width and so on, the participation of the laser field makes the original more complex scattering process becomes more complex. So the scattering problem in the laser field has become a challenging and innovative research topics. In addition, the phase difference of bichromatic laser field is an important parameter for influencing the laser-matter interaction. So the coherent phase control for bichromatic laser field is also of great research value..Based on potential field description under no laser and the perturbation theory method that can be used to processe the electron-atom scattering in a monochrome laser field, this project will explore the precise description of the interaction of bichromatic laser field, obtain a set of high-order perturbation theory calculation to deal with the electron scattering from atom and molecule in bichromatic laser field, and then study comprehensively the coherent phase control of the electron scattering from atom and molecule in the bichromatic laser field, and so on. Through analytical and numerical calculation, we will summarize the law of the coherent phase control of the electron scattering from atom and molecule in the bichromatic laser field in order to explore the microscopic mechanism of the laser-matter interaction.

近年来，随着强激光技术的不断发展，激光场中原子分子散射成为了热点研究领域。该方面研究不仅可探索激光与物质相互作用的微观机理，还可为相关实验研究提供强有力的理论指导。但由于激光本身具有频率、极化方向、脉宽等随机特征，激光场的参与使得原本比较复杂的散射过程变得更为复杂，是富有挑战性和创新性的研究课题。另外，具有倍差频率的双色激光场间的相位差是影响激光与物质作用的重要参量，因此双色场中的相干相位控制研究也极具研究应用价值。.本项目将从无场情况下势场描述和处理单色激光场中电子-原子散射的微扰理论方法入手，探索双色激光场中各种相互作用的精确描述，形成一套研究双色激光场中电子与原子分子散射的高阶微扰理论计算方法，系统研究双色激光场中电子与原子分子散射过程中的相干控制等内容。通过解析和数值计算研究，总结双色激光场下电子与原子分子散射中的相干控制等规律，从而探索双色激光场与物质相互作用的微观机理。

激光场中原子分子散射是随着近年来强激光技术的不断发展而重新成为了热点研究领域。该方面研究不仅可探索激光与物质相互作用的微观机理，还可为相关实验研究提供强有力的理论指导。但由于激光本身具有频率、极化方向、脉宽等随机特征，激光场的参与使得原本比较复杂的散射过程变得更为复杂，是富有挑战性和创新性的研究课题。另外，具有倍差频率的双色激光场间的相位差是影响激光与物质作用的重要参量，因此双色场中的相干相位控制研究也极具研究应用价值。. 本项目在广泛调研和前期研究结果的基础上，完成了对粒子间相互作用的重点研究工作，经过广泛的测算修正，完成了激光场中原子势场新模型的建立；利用新建立的计算研究方法对激光场中电子-分子散射进行了计算研究。研究了激光场中电子被CO2 分子等体系的散射截面进行计算、并与实验结果相比较；利用建立的双色激光场中的相互作用势模型和计算理论方法，对双色激光场中电子-原子散射过程中的相干相位控制效应进行深入初步研究。