High-Contrast Gratings based Spoof Surface Plasmons

• DOI: 10.1038/srep21199
• Publication Date: 2016-02-16T11:38:16Z
• Authors: Zhuo Li; Liangliang Liu; Bingzheng Xu; Pingping Ning; Chen Chen; Jia Xu; Xinlei Chen; Changqing Gu; Quan Qing
• Keywords: Perfect conductor; Dispersion relation

Abstract In this work, we explore the existence of spoof surface plasmons (SSPs) supported by deep-subwavelength high-contrast gratings (HCGs) on a perfect electric conductor plane. The dispersion relation HCGs-based SSPs is derived analyt- ically combining multimode network theory with rigorous mode matching method, which has nearly same form and can be degenerated into that arising from metallic (MGs). Numerical simula- tions validate analytical an effective medium approximation also presented to obtain formula. This work sets up unified theoretical framework for opens new vistas in plasmon optics.