Wu S W, Ogawa N, Ho W
Department of Physics and Astronomy and Department of Chemistry, University of California, Irvine, CA 92697-4575, USA.
Science. 2006 Jun 2;312(5778):1362-5. doi: 10.1126/science.1124881. Epub 2006 Apr 20.
Spatial resolution at the atomic scale has been achieved in the coupling of light to single molecules adsorbed on a surface. Electron transfer to a single molecule induced by green to near-infrared light in the junction of a scanning tunneling microscope (STM) exhibited spatially varying probability that is confined within the molecule. The mechanism involves photo-induced resonant tunneling in which a photoexcited electron in the STM tip is transferred to the molecule. The coupling of photons to the tunneling process provides a pathway to explore molecular dynamics with the combined capabilities of lasers and the STM.
在光与吸附在表面的单分子耦合方面已实现了原子尺度的空间分辨率。在扫描隧道显微镜（STM）结中，绿色到近红外光诱导的单分子电子转移表现出局限于分子内的空间变化概率。其机制涉及光诱导共振隧穿，即STM针尖中的光激发电子转移到分子上。光子与隧穿过程的耦合提供了一条利用激光和STM的综合能力来探索分子动力学的途径。
