Autuori Alice, Platzer Dominique, Lejman Mariusz, Gallician Guillaume, Maëder Lucie, Covolo Antoine, Bosse Lea, Dalui Malay, Bresteau David, Hergott Jean-François, Tcherbakoff Olivier, Marroux Hugo J B, Loriot Vincent, Lépine Franck, Poisson Lionel, Taïeb Richard, Caillat Jérémie, Salières Pascal
Université Paris-Saclay, CEA, CNRS, LIDYL,91191 Gif-sur-Yvette, France.
Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, 69622 Villeurbanne, France.
Sci Adv. 2022 Mar 25;8(12):eabl7594. doi: 10.1126/sciadv.abl7594. Epub 2022 Mar 23.
Imaging in real time the complete dynamics of a process as fundamental as photoemission has long been out of reach because of the difficulty of combining attosecond temporal resolution with fine spectral and angular resolutions. Here, we achieve full decoding of the intricate angle-dependent dynamics of a photoemission process in helium, spectrally and anisotropically structured by two-photon transitions through intermediate bound states. Using spectrally and angularly resolved attosecond electron interferometry, we characterize the complex-valued transition probability amplitude toward the photoelectron quantum state. This allows reconstructing in space, time, and energy the complete formation of the photoionized wave packet.
由于将阿秒时间分辨率与精细的光谱和角分辨率相结合存在困难，长期以来，实时成像像光发射这样基本的过程的完整动力学一直无法实现。在这里，我们实现了对氦气中光发射过程复杂的角度相关动力学的完全解码，该过程通过中间束缚态的双光子跃迁在光谱和各向异性上具有结构。利用光谱和角分辨阿秒电子干涉测量技术，我们表征了朝向光电子量子态的复值跃迁概率振幅。这使得能够在空间、时间和能量上重构光离子化波包的完整形成过程。
