Optical pump-probe scanning tunneling microscopy for probing ultrafast dynamics on the nanoscale
Optical pump-probe scanning tunneling microscopy for probing ultrafast dynamics on the nanoscale
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DOI：
10.1140/epjst/e2013-01912-2
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
S. Yoshida;Y. Terada;M. Yokota;O. Takeuchi;H. Oigawa;H. Shigekawa
中科院分区：
文献类型：
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作者：
S. Yoshida;Y. Terada;M. Yokota;O. Takeuchi;H. Oigawa;H. Shigekawa
发展一种探索具有高空间分辨率的小型有组织结构中的超快瞬态动力学的方法，有望成为当前科学和技术进一步发展的基础。最近，我们开发了一种新的显微镜技术，结合扫描隧道显微镜（STM）与超短脉冲激光技术，这使得超快载流子动力学的可视化，即使在单原子水平上。利用超短激光脉冲产生非平衡载流子分布，并利用脉冲拾取技术在STM中实现的光抽运-探测方法，在STM中探测其弛豫过程。本文综述了新的显微技术的基本原理。
The development of a method for exploring the ultrafast transient dynamics in small organized structures with high spatial resolution is expected to be a basis for further advances in current science and technology. Recently, we have developed a new microscopy technique by combining scanning tunneling microscopy (STM) with ultrashort-pulse laser technology, which enables the visualization of ultrafast carrier dynamics even on the single-atomic level. A nonequilibrium carrier distribution is generated using ultrashort laser pulses and its relaxation processes are probed by STM using the optical pump-probe method realized in STM by the pulse-picking technique. In this paper, the fundamentals of the new microscopy technique are overviewed.