Vacuum ultraviolet and terahertz pulse generation in bulk media and guided geometries based on plasma generating femtosecond light pulses

该项目致力于在太赫兹（THz）和真空紫外线（VUV）范围内由光诱导等离子体动力学介导的超短短周期强脉冲产生的新方法。我们打算开发一个统一的建模框架，包括基于正演麦克斯韦方程的整个频率范围的时空传播动力学。在与马克斯·伯恩研究所的实验活动紧密联系的情况下，我们计划对引导几何形状、自引导光诱导细丝和等离子体产生热点强聚焦情况下的脉冲传播动力学进行详细的理论研究。正向麦克斯韦方程的使用，加上对电离过程和等离子体响应的仔细建模，使我们能够描述高强度光的传播，而不受缓慢变化包络模型的通常限制。因此，将在一个统一的理论框架中考虑对等离子体斑或空心波导产生的太赫兹辐射和自压缩光丝以及非共线激光束中产生的VUV脉冲进行精确建模。

The project is devoted to novel methods of ultra-short few-cycle intense pulse generation in the terahertz (THz) as well as in the vacuum ultraviolet (VUV) range mediated by light-induced plasma dynamics. We intend to develop a unifying modelling framework with inclusion of spatio-temporal propagation dynamics for the whole frequency range based on the forward Maxwell equations. In a strong connection with experimental activities at the Max Born Institute, we plan to carry out a detailed theoretical study of the pulse propagation dynamics in guided geometries, in selfguided light-induced filaments and in the case of strong focusing in plasma-generating hot-spots. The use of forward Maxwell equations allows us, together with careful modelling of ionization processes and plasma response, to describe high-intense light propagation without the usual constraints of a slowly-varying envelope model. Thus, accurate modelling of, e.g., THz radiation from plasma spots or hollow waveguides and VUV pulse generation in self-compressed optical filaments as well as in non-collinear laser beams will be considered in a single unifying theoretical framework.