A Refractive Index Sensor Based on a Metal-Insulator-Metal Waveguide-Coupled Ring Resonator

被引:52
|
作者
Yan, Shu-Bin [1 ,2 ]
Luo, Liang [1 ,2 ]
Xue, Chen-Yang [1 ,2 ]
Zhang, Zhi-Dong [1 ,2 ]
机构
[1] North Univ China, Sci & Technol Elect Test & Measurement Lab, Taiyuan 030051, Peoples R China
[2] North Univ China, Key Lab Instrumentat Sci & Dynam Measurement, Minist Educ, Taiyuan 030051, Peoples R China
基金
中国国家自然科学基金;
关键词
surface plasmon polaritons; metal-insulator-metal waveguide; Fano resonance; refractive index sensor; finite-difference time-domain method;
D O I
10.3390/s151129183
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A refractive index sensor composed of two straight metal-insulator-metal waveguides and a ring resonator is presented. One end of each straight waveguide is sealed and the other end acts as port. The transmission spectrum and magnetic field distribution of this sensor structure are simulated using finite-difference time-domain method (FDTD). The results show that an asymmetric line shape is observed in the transmission spectrum, and that the transmission spectrum shows a filter-like behavior. The quality factor and sensitivity are taken to characterize its sensing performance and filter properties. How structural parameters affect the sensing performance and filter properties is also studied.
引用
收藏
页码:29183 / 29191
页数:9
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