Porta P A, Corbett B
Tyndall National Institute, Lee Maltings, Prospect Row, Cork, Ireland.
Opt Express. 2008 Oct 13;16(21):16305-13. doi: 10.1364/oe.16.016305.
We present the polarization resolved, angular dependent, optical reflectance properties for single TE mode optical waveguides in contact with a nanostructured gold surface. A substantial angle dependent resonant decrease in the TE polarized surface reflectivity is measured which cannot be explained by a simple waveguide coupling due to surface roughness. Rather we show that the resonance is due to the excitation of a coupled waveguide-plasmonic surface mode created by the interaction between the metal nanostructure and the waveguide. A model based on coupled mode theory is introduced in order to explain the experimental data.
我们展示了与纳米结构金表面接触的单TE模光波导的偏振分辨、角度相关的光学反射特性。测量到TE偏振表面反射率存在显著的角度相关共振下降，这不能用由于表面粗糙度引起的简单波导耦合来解释。相反，我们表明该共振是由于金属纳米结构与波导之间的相互作用产生的耦合波导 - 表面等离子体模式的激发。为了解释实验数据，引入了基于耦合模理论的模型。
