Attosecond ionization time delays in strong-field physics  

作　　者：马永哲 倪宏程 吴健 Yongzhe Ma;Hongcheng Ni;Jian Wu(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China)

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China

出　　处：《Chinese Physics B》2024年第1期102-121,共20页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.92150105,11834004,12227807,and 12241407);the Science and Technology Commission of Shanghai Municipality (Grant No.21ZR1420100)。

摘　　要：Electronic processes within atoms and molecules reside on the timescale of attoseconds. Recent advances in the laserbased pump-probe interrogation techniques have made possible the temporal resolution of ultrafast electronic processes on the attosecond timescale, including photoionization and tunneling ionization. These interrogation techniques include the attosecond streak camera, the reconstruction of attosecond beating by interference of two-photon transitions, and the attoclock. While the former two are usually employed to study photoionization processes, the latter is typically used to investigate tunneling ionization. In this review, we briefly overview these timing techniques towards an attosecond temporal resolution of ionization processes in atoms and molecules under intense laser fields. In particular, we review the backpropagation method, which is a novel hybrid quantum-classical approach towards the full characterization of tunneling ionization dynamics. Continued advances in the interrogation techniques promise to pave the pathway towards the exploration of ever faster dynamical processes on an ever shorter timescale.

关 键 词：strong-field ionization ATTOSECOND time delay photoionization time delay tunneling time delay attosecond streak camera reconstruction of attosecond beating by interference of two-photon transitions(RABBITT) attoclock backpropagation 

分 类 号：O561[理学—原子与分子物理]