Heinrich S, Saule T, Högner M, Cui Y, Yakovlev V S, Pupeza I, Kleineberg U
Max-Planck-Institut für Quantenoptik (MPQ), 85748, Garching, Germany.
Ludwig-Maximilians-Universität München (LMU), 85748, Garching, Germany.
Nat Commun. 2021 Jun 7;12(1):3404. doi: 10.1038/s41467-021-23650-7.
Time-resolved photoelectron spectroscopy with attosecond precision provides new insights into the photoelectric effect and gives information about the timing of photoemission from different electronic states within the electronic band structure of solids. Electron transport, scattering phenomena and electron-electron correlation effects can be observed on attosecond time scales by timing photoemission from valence band states against that from core states. However, accessing intraband effects was so far particularly challenging due to the simultaneous requirements on energy, momentum and time resolution. Here we report on an experiment utilizing intracavity generated attosecond pulse trains to meet these demands at high flux and high photon energies to measure intraband delays between sp- and d-band states in the valence band photoemission from tungsten and investigate final-state effects in resonant photoemission.
具有阿秒精度的时间分辨光电子能谱为光电效应提供了新的见解，并给出了关于固体电子能带结构中不同电子态光发射时间的信息。通过对价带态和芯态的光发射进行计时，可以在阿秒时间尺度上观察电子输运、散射现象以及电子-电子关联效应。然而，由于对能量、动量和时间分辨率的同时要求，迄今为止，获取带内效应极具挑战性。在此，我们报告一项实验，该实验利用腔内产生的阿秒脉冲序列，在高通量和高光子能量下满足这些要求，以测量钨价带光发射中sp带和d带态之间的带内延迟，并研究共振光发射中的终态效应。
