光助扫描隧道显微镜跟踪局域电离动力学的理论研究
Local Ionization Dynamics Traced by Photoassisted Scanning Tunneling Microscopy: A Theoretical Approach
摘要：
为了跟踪电子系统的时空演化，我们建议和理论分析的设置，利用良好的空间分辨率的基础上扫描隧道显微镜技术结合飞秒泵浦-探测光电子能谱学的时间分辨率。作为一个例子，我们考虑激光诱导，局部振动动力学的表面吸附分子。由激光脉冲释放的光电子可以由扫描尖端收集并用于访问时空动力学。我们的原理证明计算的基础上的时间依赖性薛定谔方程的从头计算的矩阵元素确定的动态支持的解决方案。
英文摘要：
For tracing the spatiotemporal evolution of electronic systems, we suggest and analyze theoretically a setup that exploits the excellent spatial resolution based on scanning tunneling microscopy techniques combined with the temporal resolution of femtosecond pump-probe photoelectron spectroscopy. As an example, we consider the laser-induced, local vibrational dynamics of a surface-adsorbed molecule. The photoelectrons released by a laser pulse can be collected by the scanning tip and utilized to access the spatiotemporal dynamics. Our proof-of-principle calculations are based on the solution of the time-dependent Schrooedinger equation supported by the ab initio computation of the matrix elements determining the dynamics.
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