Laser-assisted photoelectric effect from surfaces
Laser-assisted photoelectric effect from surfaces
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DOI：
10.1103/physrevlett.97.113604
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发表时间：
2006-09-15
影响因子：
8.6
通讯作者：
Saathoff, G.
中科院分区：
文献类型：
--
作者：
Miaja-Avila, L.;Lei, C.;Saathoff, G.
我们报告的第一个观察到的激光辅助光电效应从固体表面。用1.6eV和42eV超短脉冲同时照射Pt（111）样品，观察到极紫外光电子能谱的边带。这些边带的幅度作为激光和极紫外脉冲之间的时间延迟的函数表示极紫外脉冲的互相关测量。这种效应有望有助于将极紫外脉冲持续时间测量扩展到更高的光子能量，以及在固体和表面吸附物系统中开辟飞秒到阿秒时间尺度的电子动力学。
We report the first observation of the laser-assisted photoelectric effect from a solid surface. By illuminating a Pt(111) sample simultaneously with ultrashort 1.6 eV and 42 eV pulses, we observe sidebands in the extreme ultraviolet photoemission spectrum. The magnitude of these sidebands as a function of time delay between the laser and extreme ultraviolet pulses represents a cross-correlation measurement of the extreme ultraviolet pulse. This effect promises to be useful to extend extreme ultraviolet pulse duration measurements to higher photon energies, as well as opening up femtosecond-to-attosecond time-scale electron dynamics in solid and surface-adsorbate systems.