摘要
设计了一种新型的基于金属表面等离子激元(Surface Plasmon Polaritons,SPPs)的亚波长金属-介质-金属型滤波器.该滤波器由一个半圆形谐振腔和一个直波导组成.利用时域耦合模理论和传输变换矩阵方法对结构进行理论分析,并通过时域有限差分方法(the finite difference time domain method,FDTD)进行数值模拟得出光谱响应.讨论了几何参数对透射曲线的影响,并设计了一种双腔结构来获得高对比度的透射曲线.
A novel subwavelength surface plasmon polaritons optical filter based on metal-dielectric -metal （MDM） waveguide with the semicircular cavity is proposed and investigated. Temporal coupled mode theory and the finite difference time domain method （FDTD） are utilized to analyze the structure and get the transmission response. The filter characteristic and the dependence of the resonant wavelength on geometric parameters of the structure are discussed in this paper, and a type of double cavities structure is designed in order to realize higher transmission contrast.
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2013年第2期64-68,共5页
Journal of South China Normal University(Natural Science Edition)
基金
国家自然科学基金项目(61275059)
广东省自然科学基金项目(1015106310100014)
