论文标题
Attosent Time延迟和Fano的倾向规则的分析模型
Analytical model for attosecond time delays and Fano's propensity rules in the continuum
论文作者
论文摘要
从Attosent Time尺度的两光子实验中提取与原子（或分子）物种相关的单个光电离时间延迟通常取决于连续性 - 胞源转变的理论描述。这些过程的可用模型预测了通用相位的贡献，与最终状态的角度量子数无关。但是，最近的一项实验理论研究[Fuchs，\ emph {et al。} Optica 7，154（2020）]确定了相当大的时间延迟依赖于接近阈值光电子的角动量。在这项研究中，我们提出了一个分析模型的两光子两色跃迁矩阵振幅，该模型重现了对最终状态的角度量子数的相位依赖性。最后，我们表明我们的分析模型还可以描述广义的Fano倾向规则[Busto，\ Emph {et al。} Phys。莱特牧师。 123，133201（2019）]用于激光辅助光电离。
Extracting single photoionization time delays associated with atomic (or molecular) species from attosecond time scale two-photon experiments usually relies on the theoretical description of continuum-continuum transitions. The available models for those processes predict a universal phase contribution, independent of the angular quantum numbers of final states. However, a recent experimental-theoretical study [Fuchs, \emph{et al.} Optica 7, 154 (2020)] determined a sizable time delay dependence on the angular momentum of near-threshold photoelectrons. In this study, we present an analytical model for the two-photon two-color transition matrix amplitudes that reproduces the phase dependence on the angular quantum number of final states. Finally, we show that our analytical model can also describe the generalized Fano's propensity rules [Busto, \emph{et al.} Phys. Rev. Lett. 123, 133201 (2019)] for laser-assisted photoionization.
