原子及小分子在强激光场中的里德堡态激发和动力学过程

项目名称： 原子及小分子在强激光场中的里德堡态激发和动力学过程

项目编号： No.11274140

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 徐海峰

作者单位： 吉林大学

项目金额： 90万元

中文摘要： 里德堡态激发作为原子分子与强激光场相互作用的一个新的物理现象，其动力学过程和物理机制仍不是非常清楚，亟待进一步的研究解决。本项目针对原子及小分子在飞秒强激光场中的里德堡态的激发和动力学过程进行研究。利用脉冲电场场致电离或可调谐纳秒激光电离的方法，检测里德堡态电离产生的离子或者电子，获得强激光场中里德堡态激发-电离（或解离）过程相关的产物质量通道、平动能分布、以及离子内能和电子能量分布等详细信息。通过研究里德堡态的激发过程对飞秒激光的光场参数的依赖，深入认识里德堡态激发的机制以及与其它强场中原子分子物理过程的关系。项目旨在测量强激光场中原子及小分子里德堡态的量子态分布和产率，对其中的物理机制进行深入的研究和探讨，加深对原子及小分子与飞秒强激光相互作用机制的认识，促进相关理论的发展。

中文关键词： 里德堡态；激发和动力学；原子及小分子；强激光场；

英文摘要： Excitation of Rydberg states is a new feature in the interaction of atoms and molecules with strong laser field, of which the dynamics and mechanism are still currently unclear, requiring to perform further studies to reveal it. This proposal is aimed at investigation of the excitation and dynamics of Rydberg states of atoms and small molecules in femtosecond strong laser field. By applying pulsed field ionization and/or nanosecond laser ionization methods, we will detect the ions or electrons which are produced from Rydberg state ionization, thus to obtain detail information about the mass channels, kinetic energy distribution, ion internal and electron energy distribution,during the process of Rydberg states excitation-ionization (and/or dissociation) in strong laser field. By investigating the dependence of Rydberg excitation on the femtosecond laser field, we will achieve more insight understanding about the mechanism of Rydberg excitation and the competition among different physical phenomena of atoms and molecules in strong laser fields. The purpose of the proposal is to determine the quantum state distribution and quantum yield of Rydberg states of atoms and small molecules in strong laser field, to further study and understand its mechanism, therefore to add more understanding about the interaction of at

英文关键词： Rydberg state；Excitation and dynamics；Atom and small molecules；Strong laser field；