Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide

Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide

A metal–insulator–metal (MIM) waveguide consisting of a circular split-ring resonance cavity (CSRRC) and a double symmetric rectangular stub waveguide (DSRSW) is designed, which can excite quadruple Fano resonances. The finite element method (FEM) is used to investigate influences of geometric param...

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Autores principales: Jianfeng Chen, Hao Yang, Zhiyuan Fang, Ming Zhao, Chenbo Xie
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
quadruple Fano resonances
MIM waveguide
sensing characteristics
independent tuning
Applied optics. Photonics
TA1501-1820
Acceso en línea:https://doaj.org/article/19021fe5d0434c7db049215b93f7a14c
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spelling oai:doaj.org-article:19021fe5d0434c7db049215b93f7a14c2021-11-25T18:43:04ZRefractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide10.3390/photonics81104722304-6732https://doaj.org/article/19021fe5d0434c7db049215b93f7a14c2021-10-01T00:00:00Zhttps://www.mdpi.com/2304-6732/8/11/472https://doaj.org/toc/2304-6732A metal–insulator–metal (MIM) waveguide consisting of a circular split-ring resonance cavity (CSRRC) and a double symmetric rectangular stub waveguide (DSRSW) is designed, which can excite quadruple Fano resonances. The finite element method (FEM) is used to investigate influences of geometric parameters on the transmission characteristics of the structure. The results show that Fano resonances are excited by the interference between the DSRSW and the CSRRC. Among them, the resonance wavelengths of the Fano resonances are tuned by the narrow-band discrete state excited by the CSRRC, and the resonance line transmittance and profiles are tuned by the wide-band continuous state excited by the DSRSW. The sensitivity (S) can be up to 1328.8 nm/RIU, and the figure of merit (FOM) can be up to 4.80 × 10<sup>4</sup>. Based on these advantages, the structure has potential applications in sensing in the sub-wavelength range.Jianfeng ChenHao YangZhiyuan FangMing ZhaoChenbo XieMDPI AGarticlequadruple Fano resonancesMIM waveguidesensing characteristicsindependent tuningApplied optics. PhotonicsTA1501-1820ENPhotonics, Vol 8, Iss 472, p 472 (2021)
institution DOAJ
collection DOAJ
language EN
topic quadruple Fano resonances
MIM waveguide
sensing characteristics
independent tuning
Applied optics. Photonics
TA1501-1820
spellingShingle quadruple Fano resonances
MIM waveguide
sensing characteristics
independent tuning
Applied optics. Photonics
TA1501-1820
Jianfeng Chen
Hao Yang
Zhiyuan Fang
Ming Zhao
Chenbo Xie
Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide
description A metal–insulator–metal (MIM) waveguide consisting of a circular split-ring resonance cavity (CSRRC) and a double symmetric rectangular stub waveguide (DSRSW) is designed, which can excite quadruple Fano resonances. The finite element method (FEM) is used to investigate influences of geometric parameters on the transmission characteristics of the structure. The results show that Fano resonances are excited by the interference between the DSRSW and the CSRRC. Among them, the resonance wavelengths of the Fano resonances are tuned by the narrow-band discrete state excited by the CSRRC, and the resonance line transmittance and profiles are tuned by the wide-band continuous state excited by the DSRSW. The sensitivity (S) can be up to 1328.8 nm/RIU, and the figure of merit (FOM) can be up to 4.80 × 10<sup>4</sup>. Based on these advantages, the structure has potential applications in sensing in the sub-wavelength range.
format article
author Jianfeng Chen
Hao Yang
Zhiyuan Fang
Ming Zhao
Chenbo Xie
author_facet Jianfeng Chen
Hao Yang
Zhiyuan Fang
Ming Zhao
Chenbo Xie
author_sort Jianfeng Chen
title Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide
title_short Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide
title_full Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide
title_fullStr Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide
title_full_unstemmed Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide
title_sort refractive index sensing based on multiple fano resonances in a split-ring cavity-coupled mim waveguide
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/19021fe5d0434c7db049215b93f7a14c
work_keys_str_mv AT jianfengchen refractiveindexsensingbasedonmultiplefanoresonancesinasplitringcavitycoupledmimwaveguide
AT haoyang refractiveindexsensingbasedonmultiplefanoresonancesinasplitringcavitycoupledmimwaveguide
AT zhiyuanfang refractiveindexsensingbasedonmultiplefanoresonancesinasplitringcavitycoupledmimwaveguide
AT mingzhao refractiveindexsensingbasedonmultiplefanoresonancesinasplitringcavitycoupledmimwaveguide
AT chenboxie refractiveindexsensingbasedonmultiplefanoresonancesinasplitringcavitycoupledmimwaveguide
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