Fano Resonance in the Plasmonic Structure of MIM Waveguide with r-Shaped Resonator for Refractive Index Sensor

被引：33

作者：

Rohimah, Siti ^{[1
]}

Tian, He ^{[1
]}

Wang, Jinfang ^{[2
]}

Chen, Jianfeng ^{[1
]}

Li, Jina ^{[1
]}

Liu, Xing ^{[1
]}

Cui, Jingang ^{[1
]}

Xu, Qiang ^{[1
]}

Hao, Yu ^{[3
]}

机构：

[1] Northeast Forestry Univ, Coll Sci, Harbin 150040, Peoples R China

[2] Shanghai Xin Yue Lian Hui Elect Technol Co LTD, Shanghai 200233, Peoples R China

[3] Jilin Meteorol Informat Network Ctr, Changchun 130062, Peoples R China

来源：

PLASMONICS | 2022年 / 17卷 / 04期

关键词：

Surface plasmon polaritons; Fano resonance; r-shaped resonator; Refractive index sensor; INDUCED TRANSPARENCY; FILTER;

D O I：

10.1007/s11468-022-01655-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A plasmonic structure of metal-insulator-metal (MIM) waveguide consisting of a baffle waveguide and an r-shaped resonator is designed to produce Fano resonances. The finite element method is used to analyze the transmission characteristics and magnetic field distributions of the plasmonic structure. The simulation results show that two Fano resonances can be achieved by the interference between a continuum state in the baffle waveguide and a discrete state in the r-shaped resonator. The Fano resonances can be tuned by changing the geometrical parameters of the plasmonic structure. The refractive index sensing is investigated and it is found that the sensitivity is strongly dependent on the geometrical parameters. The maximum sensitivity is 1333 nm/RIU, with the figure of merit of 5876. The results of the designed plasmonic structure offer high sensitivity and nano-scale integration, which are beneficial to nano-scale refractive index sensors, biosensors, and photonic devices.

引用

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页码：1681 / 1689

页数：9

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