论文标题
在角度分辨的attosecond Time延迟上的两色极化控制
Two-color polarization control on angularly resolved attosecond time delays
论文作者
论文摘要
如最近的Rabbitt（通过两光子过渡的干扰）实验所示，测得的光电离时间延迟可能与发射角的函数显示出很大的变化，即使对于球形对称靶标的函数，即使是球形对称的靶标的函数。从不同途径到两光子量子通道的贡献已经可以解释观察到的相位跳跃，从而塑造了这些角度分布。在这里，我们提出了一个简单的分析模型，以描述有角度分辨的Rabbitt Spectra，这是电离Attosecond脉冲序列与辅助IR场之间相对极化角的函数。我们证明，可以在分析上预测测得的延迟的角度依赖性，并且相位跳跃的位置减少到对少数相关参数的分析。
Measured photoionization time delays may exhibit large variations as a function of the emission angles, even for spherically symmetric targets, as shown in recent RABBITT (reconstruction of attosecond beating by interference of two-photon transitions) experiments. The contributions from different pathways to the two-photon quantum channels can already explain the observed phase jumps that shape those angular distributions. Here, we propose a simple analytical model to describe angularly-resolved RABBITT spectra as a function of the relative polarization angle between the ionizing attosecond pulse train and the assisting IR field. We demonstrate that the angular dependencies of the measured delays can be analytically predicted and the position of the phase jumps reduced to the analysis of a few relevant parameters.
