A Nanostructure with Defect Based on Fano Resonance for Application on Refractive-Index and Temperature Sensing

被引：16
|
作者：
Yang, Xiaoyu [1 ,2 ]
Hua, Ertian [2 ]
Su, Hao [1 ]
Guo, Jing [2 ]
Yan, Shubin [1 ,2 ]
机构：
[1] North Univ China, Sch Instrument & Elect, Taiyuan 030051, Peoples R China
[2] Zhejiang Univ Water Resources & Elect Power, Sch Elect Engn, Key Lab Technol Rural Water Management Zhejiang P, Hangzhou 310018, Peoples R China
来源：
SENSORS | 2020年 / 20卷 / 15期
基金：
中国国家自然科学基金;
关键词：
metal-insulator-metal; Fano resonance; refractive-index nanosensor; temperature sensing; PLASMONIC WAVE-GUIDE; FILTERS;
D O I：
10.3390/s20154125
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Herein, a nanosensor structure is proposed, which comprises metal-insulator-metal (MIM) waveguide with stub and circular ring cavity with a stub (CRCS). The phenomenon of Fano resonance appears in the transmission spectrum, which is formed by interaction between the narrowband mode of CRCS and broadband mode of stub on bus waveguide. The influence of geometric asymmetry on mode splitting of Fano resonance was discussed. The mode splitting of Fano resonance can vastly improve figure of merit (FOM) with a sight decrease of sensitivity. The best performance of the refractive-index nanosensor is attained, which is 1420 nm/RIU with a high FOM of 76.76. Additionally, the application of designed structure on temperature sensing was investigated, which has sensitivity of 0.8 nm/degrees C. The proposed structure also possesses potential applications on other on-chip nanosensors.
引用
收藏
页码：1 / 10
页数：10
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