Raman Interferometry between Autoionizing States to Probe Ultrafast Wave-Packet Dynamics with High Spectral Resolution
Raman Interferometry between Autoionizing States to Probe Ultrafast Wave-Packet Dynamics with High Spectral Resolution
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DOI：
10.1103/physrevlett.128.083001
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发表时间：
2022-02-22
影响因子：
8.6
通讯作者：
Sandhu, A.
中科院分区：
文献类型：
--
作者：
Plunkett, A.;Alarcon, M. A.;Sandhu, A.
飞秒和阿秒光脉冲的光电子干涉术是研究快电子波包动力学的有力工具，但它在能量分辨率上有一定的局限性。我们表明，一个可以同时获得高的时间和光谱分辨率，通过刺激拉曼干涉与一个光脉冲和监测的修改的电子产额在一个单独的步骤。将这种光谱方法应用于氩的自电离态，我们在实验上精确地解析了它的电子组成和时间演化。理论计算结果与观测结果吻合得很好，并揭示了光-物质相互作用参数。使用适当的拉曼探测和延迟检测步骤，该技术能够在复杂系统中实现高灵敏度的探测和电子动力学控制。
Photoelectron interferometry with femtosecond and attosecond light pulses is a powerful probe of the fast electron wave-packet dynamics, albeit it has practical limitations on the energy resolution. We show that one can simultaneously obtain both high temporal and spectral resolution by stimulating Raman interferences with one light pulse and monitoring the modification of the electron yield in a separate step. Applying this spectroscopic approach to the autoionizing states of argon, we experimentally resolved its electronic composition and time evolution in exquisite detail. Theoretical calculations show remarkable agreement with the observations and shed light on the light-matter interaction parameters. Using appropriate Raman probing and delayed detection steps, this technique enables highly sensitive probing and control of electron dynamics in complex systems.