Xu Yidan, Han Lulu, Jiang Wenyu, Zuo Zitan, Pan Shengzhe, Fleischer Avner, Ueda Kiyoshi, Wu Jian
Opt Lett. 2024 Jun 15;49(12):3412-3415. doi: 10.1364/OL.523947.
Photoionization is one of the most fundamental processes in light-matter interaction. Advanced attosecond photoelectron spectroscopy provides the possibility to characterize the ultrafast photoemission process in an extremely short attosecond time scale. Following scattering symmetry rules, residual ions encode ultrafast photoionization prints at the instant of electron removal forming an alternative electron emission chronoscope. Here, we experimentally illustrate the attosecond ion reconstruction of attosecond beating by interference of two-photon transition (RABBIT)-like interferometry through the development of high-resolution ion momentum detection in atomic photoionization processes. Our ion interferometry presents identical momentum- and time-dependent scattering phase shift, as we observed in photoelectron spectroscopy, and thus demonstrates that ion interferometry can be a possible alternative attosecond approach to resolve the photoionization process, without the electron homogeneity limitation.
光电离是光与物质相互作用中最基本的过程之一。先进的阿秒光电子能谱提供了在极短的阿秒时间尺度上表征超快光发射过程的可能性。遵循散射对称规则，残余离子在电子移除瞬间编码超快光电离印记，形成一种替代的电子发射计时仪。在此，我们通过在原子光电离过程中发展高分辨率离子动量检测，通过双光子跃迁（RABBIT）类干涉测量实验展示了阿秒拍频的阿秒离子重构。我们的离子干涉测量呈现出与我们在光电子能谱中观察到的相同的动量和时间相关的散射相移，因此表明离子干涉测量可以成为一种可能的替代阿秒方法来解析光电离过程，而不受电子均匀性的限制。
