金属半圆环/长板阵列的法诺共振特性

Fano resonance properties of the arrays of metallic half-ring/rectangle structure

本文设计了金属半圆环/长板阵列,并应用有限元方法研究了该阵列的透射特性。研究表明:由于半圆环与长板之间的电场耦合,在该阵列中产生了法诺共振现象。法诺共振峰强烈地依赖于半圆环/长板的结构参数和相对位置,并且法诺共振峰对周围介质折射率有着较高的灵敏度,最高可以达到862.5 nm/RIU。这些结果有助于设计基于法诺共振的微纳光子学器件。

In this paper, arrays of metallic half-ring/rectangle were designed, and their transmission proper-ties were investigated by the finite element method.Fano resonances appeare in the transmission spectra due to the electric field couplings between the half-ring and rectangle.Fano resonant peaks are dependent strongly on the structural parameters and the relative position of the half-ring and rectangle.They are also sensitive to re-fraction index around the arrays of metallic half-ring/rectangle and the highest sensitivity can be achieved to 862.5 nm/RIU.These results would be helpful for designing the micro-nano photonic devices based on the Fano resonance.