Reconstruction of attosecond beating by interference of two-photon transitions (RABBITT) is an established technique for studying time-delay in photoionization of atoms and molecules. It has been recently extended to angle-resolved studies, accessing diverse fingerprint observables of the attosecond photoemission dynamics within the bound-continuum and continuum–continuum transitions. In this work, we address the general form of the I SB ( θ , τ ) two-photon photoelectron angular distributions (PADs) associated to the RABBITT sideband signal, as a function of the emission angle θ , and the delay τ between the XUV attosecond pulse train and the infrared (IR) dressing field at play in the RABBITT scheme. Relying on the expansion in Legendre polynomials, the PAD is synthesized in terms of a reduced set of coefficients which fully describe both its static ( τ -independent) and dynamic ( τ -dependent) components and enables us to retr...

中文翻译：

---

RABBITT方案中XUV-IR双光子电离的角度分辨研究

通过双光子跃迁的干扰来重建阿秒跳动（RABBITT）是一项研究原子和分子光电离中的时间延迟的成熟技术。最近，它已扩展到角度分辨研究，获得了在束缚连续谱和连续谱-连续谱跃迁中阿秒光发射动力学的各种指纹可观察性。在这项工作中，我们讨论了与RABBITT边带信号相关的I SB（θ，τ）双光子光电子角分布（PAD）的一般形式，它是发射角θ和XUV之间的延迟τ的函数在RABBITT方案中发挥作用的是阿秒脉冲序列和红外（IR）修整场。依靠勒让德多项式的展开式，