Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Phys Rev Lett. 2010 Sep 17;105(12):123202. doi: 10.1103/PhysRevLett.105.123202. Epub 2010 Sep 13.
Laser-assisted electron scattering (LAES) in a femtosecond near-infrared intense laser field was observed through the scattering of 1 keV electrons by xenon atoms. The intensities, angular distributions, and laser polarization dependence of the observed LAES signals for the energy gain (+ℏω) and energy loss (-ℏω) processes were interpreted well by numerical simulations. As an application of this femtosecond-LAES process, a new method of time-resolved gas electron diffraction for probing geometrical change of molecules with high precision is proposed.
通过 1keV 电子与氙原子的散射，观察到飞秒近红外强激光场中的激光辅助电子散射（LAES）。数值模拟很好地解释了观察到的 LAES 信号的强度、角分布和激光偏振依赖性，这些信号对应于能量增益（+ℏω）和能量损失（-ℏω）过程。作为这种飞秒-LAES 过程的应用，提出了一种新的时间分辨气体电子衍射方法，用于高精度探测分子的几何变化。
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