论文标题
激光协助的氩原子光电离：条纹，边带和脉搏列表研究案例
Laser-assisted photoionization of argon atoms: streaking, sideband and pulse train studying cases
论文作者
论文摘要
我们提出了原子激光辅助光电离发射（LAPE）的理论研究。我们认为在两种不同的情况下是由线性两极化的XUV激光器驱动的原子：i）单个attsond脉冲（在条纹和边带状态下）和ii）attosecond脉冲序列。该过程是由线性极化红外（IR）激光场辅助进行的。在所有这些情况下，能量和角度分辨的光电子光谱（PES）取决于与内部因子有关的主要贡献[Gramajo等，J。Phys。 b 51，055603（2018）]，由其他辅助，源自偶极性过渡矩阵相对于IR场的周期性和对称特性。这些术语中的每一个都贴上PES中特定的特征，可以从广义能源保护法方面直接理解。我们详细研究了这些PES结构最初在3S量子状态下的氩结构。但是，我们基于强场近似（SFA）的理论方案也可以应用于其他原子种和田间构型。
We present a theoretical study of atomic laser-assisted photoionization emission (LAPE). We consider an atom driven by a linearly polarized XUV laser in two different scenarios: i) a single attosecond pulse (in both the streaking and sideband regimes) and ii) an attosecond pulse train. The process takes place assisted by a linearly polarized infrared (IR) laser field. In all these cases the energy and angle-resolved photoelectron spectrum (PES) is determined by a leading contribution, related to the intracycle factor [Gramajo et al., J. Phys. B 51, 055603 (2018)], complemented by other ones, derived from the periodicity and symmetry properties of the dipole transition matrix with respect to the IR field. Each of these terms imprint particular features in the PES that can be straightforwardly understood in terms of generalized energy conservation laws. We investigate in detail these PES structures, in particular, for the case of argon initially in the 3s quantum state. Our theoretical scheme, based on the strong-field approximation (SFA), can be applied, however, to other atomic species and field configurations as well.
