Time-resolved photoemission using attosecond streaking

28th International Conference on Photonic, Electronic and Atomic Collisions

Nagele, S.^1 ; Pazourek, R.^1 ; Wais, M.^1 ; Wachter, G.^1 ; Burgdörfer, J.^1

Institute for Theoretical Physics, Vienna University of Technology, Vienna

1040, Austria^1

关键词: Classical simulation;    Coulomb potential;    Endohedral fullerene;    One-electron systems;    Photoionization process;    Quantum mechanical;    Short-ranged potentials;    Time-resolved photoemissions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/1/012004/pdf
DOI  :  10.1088/1742-6596/488/1/012004

来源: IOP

【 摘 要 】

We theoretically study time-resolved photoemission in atoms as probed by attosecond streaking. We review recent advances in the study of the photoelectric efect in the time domain and show that the experimentally accessible time shifts can be decomposed into distinct contributions that stem from the feld-free photoionization process itself and from probe-field induced corrections. We perform accurate quantum-mechanical as well as classical simulations of attosecond streaking for efective one-electron systems and determine all relevant contributions to the time delay with attosecond precision. In particular, we investigate the properties and limitations of attosecond streaking for the transition from short-ranged potentials (photodetachment) to long-ranged Coulomb potentials (photoionization). As an example for a more complex system, we study time-resolved photoionization for endohedral fullerenes A@C60and discuss how streaking time shifts are modifed due to the interaction of the C60cage with the probing infrared streaking field.