在课堂演示实验中引入光学异常透射现象

本文讨论了如何在大学物理单缝的夫琅禾费衍射课堂演示实验中引入当前光学领域研究前沿的一个重要物理现象-亚波长金属缝异常光学透射现象.基于数值模拟,比较了在夫琅禾费衍射实验条件下,纳米尺寸单缝的异常光学透射和微米尺度单缝衍射的特点,讨论并指出纳米单缝的异常透射特征是纳米尺度光与物质强相互作用的反映,而这种强相互作用在微米尺度单缝的夫琅禾费衍射中是不显著的.最后对用于课堂演示的衍射实验装置的设计进行了讨论.

Introducing extraordinary optical transmission into demonstration experiment in class

This paper discusses how to introduce extraordinary optical transmission, which is one of frontiers of optical research, into single slit diffraction experiment demonstrated for University Physics class. Based on numerical simulation, the diffraction phenomenon of nano scale single-slit and micro scale single-slit are compared under Fraunhofer diffraction condition. It is pointed out that such anomalous diffraction charateristics of nano scale single slit originates from the strong interaction between light and matter in nanoscale, which is not significant in the Fraunhofer diffraction from micro scale single slit. Finally, the design of the demonstration experimental system for class is discussed.