Simulation of the electron dynamics of chiral systems in CEP-stabilized, intense laser fields

本计画旨在发展一个描述电子手性势环境的数值模型系统。该系统与强的圆偏振激光场的相互作用导致电离，即电子的发射。电子的不对称角分布（多光子-光电子圆二色性，PECD）将被数值计算。这个简单的模型不能提供关于多电子效应的信息，然而，中间激发态和连续统的作用，在现有的方法中没有得到适当的描述，可以很好地检验。该模型系统的量子动力学计算结果将与现有的PECD计算方法进行比较。重点在于检查手性系统的相互作用与强，超短的激光脉冲只有几个光周期。这种脉冲固有地具有很强的不对称性。我们打算研究激光脉冲的这种额外的不对称性是否以及如何导致光电子（不对称）角分布的改变。我们计划与Matthias Wollenhaupt教授（Universität Oldenburg）的团队密切合作，他们的实验目标是研究PECD对强、少周期激光脉冲的影响。

This project aims at developing a numerical model system describing a chiral potential environment for an electron. Interaction of this system with intense, circularly polarized laser fields leads to ionization, i.e. emission of the electron. The asymmetric angular distribution of the electron (multiphoton-photoelectron circular dichroism, PECD) will be numerically calculated. This simple model does not provide information on multi-electron effects, however, the role of intermediate, excited states and the continuum, which are not properly described in existing approaches, can be well examined. The results of the quantum dynamical calculations of this model system will be compared to existing approaches calculating PECD. The focus lies on the examination of the interaction of chiral systems with intense, ultrashort laser pulses with only a few optical cycles. Such pulses inherently possess a strong asymmetry. We intend to investigate if and how this additional asymmetry of the laser pulse may lead to a modification of the (asymmetric) angular distribution of photoelectrons.We plan to closely collaborate with the group of Prof. Dr. Matthias Wollenhaupt (Universität Oldenburg) who experimentally aim at investigating PECD for intense, few-cycle laser pulses.