Real-time observation of electronic, vibrational, and rotational dynamics in nitric oxide with attosecond soft x-ray pulses at 400 eV
Real-time observation of electronic, vibrational, and rotational dynamics in nitric oxide with attosecond soft x-ray pulses at 400 eV
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DOI：
10.1364/optica.6.001542
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发表时间：
2019-12-20
期刊：
影响因子：
10.4
通讯作者：
Itatani, Jiro
中科院分区：
文献类型：
--
作者：
Saito, Nariyuki;Sannohe, Hiroki;Itatani, Jiro
分子中的光致量子动力学具有与电子和核运动相关的不同能量尺度的分层时间结构。利用光子能量低于300 eV的高谐波产生（HHG）的飞秒-阿秒瞬态吸收光谱（TAS）已经成为在桌面方式下观察这种电子和核动力学的有力工具。然而，电子、振动和旋转分子动力学的全面测量尚未实现。本文首次在氮k边（400 eV）上展示了基于hhg的TAS，并在阿秒到亚皮秒的时间尺度上观察了一氧化氮分子的所有电子、振动和旋转自由度。这种利用核价跃迁的方法提供了一种全光学方法来揭示具有元素和电子态特异性的光化学反应中的完整分子动力学。(c)根据OSA开放获取出版协议的条款，2019年美国光学学会
Photoinduced quantum dynamics in molecules have hierarchical temporal structures with different energy scales that are associated with electron and nuclear motions. Femtosecond-to-attosecond transient absorption spectroscopy (TAS) using high-harmonic generation (HHG) with a photon energy below 300 eV has been a powerful tool to observe such electron and nuclear dynamics in a table-top manner. However, comprehensive measurements of the electronic, vibrational, and rotational molecular dynamics have not yet been achieved. Here we demonstrate HHG-based TAS at the nitrogen K-edge (400 eV) for the first time to our knowledge and observe all the electronic, vibrational, and rotational degrees of freedom in a nitric oxide molecule at attosecond to sub-picosecond time scales. This method of employing core-to-valence transitions offers an all-optical approach to reveal the complete molecular dynamics in photochemical reactions with element and electronic state specificity. (c) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement