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基于法诺共振的金属-绝缘体-金属波导与哨形腔耦合的折射率传感器

Refractive Index Sensor Based on the Fano Resonance in Metal-Insulator-Metal Waveguides Coupled with a Whistle-Shaped Cavity.

作者信息

Li Bo, Sun Huarong, Zhang Huinan, Li Yuetang, Zang Junbin, Cao Xiyuan, Zhu Xupeng, Zhao Xiaolong, Zhang Zhidong

机构信息

School of Software, North University of China, Taiyuan 030051, China.

Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China.

出版信息

Micromachines (Basel). 2022 Sep 25;13(10):1592. doi: 10.3390/mi13101592.

DOI:10.3390/mi13101592
PMID:36295945
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9610565/
Abstract

A plasmonic refractive index sensor based on surface plasmon polaritons (SPPs) that consist of metal-insulator-metal (MIM) waveguides and a whistle-shaped cavity is proposed. The transmission properties were simulated numerically by using the finite element method. The Fano resonance phenomenon can be observed in their transmission spectra, which is due to the coupling of SPPs between the transmission along the clockwise and anticlockwise directions. The refractive index-sensing properties based on the Fano resonance were investigated by changing the refractive index of the insulator of the MIM waveguide. Modulation of the structural parameters on the Fano resonance and the optics transmission properties of the coupled structure of two MIM waveguides with a whistle-shaped cavity were designed and evaluated. The results of this study will help in the design of new photonic devices and micro-sensors with high sensitivity, and can serve as a guide for future application of this structure.

摘要

提出了一种基于表面等离激元极化激元（SPP）的表面等离子体折射率传感器，该传感器由金属-绝缘体-金属（MIM）波导和哨形腔组成。利用有限元方法对传输特性进行了数值模拟。在其传输光谱中可以观察到法诺共振现象，这是由于沿顺时针和逆时针方向传输的SPP之间的耦合所致。通过改变MIM波导绝缘体的折射率，研究了基于法诺共振的折射率传感特性。设计并评估了结构参数对具有哨形腔的两个MIM波导耦合结构的法诺共振和光学传输特性的调制。本研究结果将有助于设计具有高灵敏度的新型光子器件和微传感器，并可为该结构的未来应用提供指导。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/cb3e1b8edee0/micromachines-13-01592-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/29e7cf12507f/micromachines-13-01592-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/0c0a3353925c/micromachines-13-01592-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/3320f4118b1b/micromachines-13-01592-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/164f22007514/micromachines-13-01592-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/b0b20f2e0ed0/micromachines-13-01592-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/cb3e1b8edee0/micromachines-13-01592-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/29e7cf12507f/micromachines-13-01592-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/0c0a3353925c/micromachines-13-01592-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/3320f4118b1b/micromachines-13-01592-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/164f22007514/micromachines-13-01592-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/b0b20f2e0ed0/micromachines-13-01592-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9394/9610565/cb3e1b8edee0/micromachines-13-01592-g006.jpg

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