Low-Energy Interference Structure with Attosecond Temporal Resolution
Abstract
Accessing precisely to the phase variation of electronic wave-packet (EWP) provides unprecedented spatiotemporal information of microworld. A radial interference pattern at near-zero energy has been widely observed in experiments of strong-field photoionization. However, the underlying physical picture of this interference pattern is still under debate. Here we report an experimental and theoretical investigation of this low-energy interference structure (LEIS) in mid-infrared laser fields. We clarify that the LEIS arises due to the soft-recollision mechanism, which was previously found to play a pivotal role in producing the pronounced low-energy structure. Specifically, the LEIS is induced by the interference between direct and soft-recollision EWPs launched within a 1/18 laser-cycle time scale in our experiments. Moreover, the observation of LEIS is independent of laser wavelength and specific atomic targets. Our result opens a promising new avenue for retrieving the structure and dynamics of EWPs in atoms and molecules with attosecond time resolution.
Cite
@article{arxiv.2002.04998,
title = {Low-Energy Interference Structure with Attosecond Temporal Resolution},
author = {Xiaohong Song and Wenbin Jia and Xiwang Liu and Hongdan Zhang and Qibing Xue and Cheng Lin and Wei Quan and Jing Chen and XiaoJun Liu and Weifeng Yang},
journal= {arXiv preprint arXiv:2002.04998},
year = {2021}
}