{"title":"High Q Factor and Sensitivity Fano Resonance Based on a Graphene-With Ring-Column Dimer Array Structure","authors":"Zhiguo Chen, Boxun Li, Lili Zeng, Mingliang Liu, Xingjiao Zhang, Ruquan Wen, Chaosheng Deng","doi":"10.1007/s11468-024-02203-w","DOIUrl":null,"url":null,"abstract":"<div><p>Metasurfaces in all-dielectric are diffusely used in non-linear optical and high sensitivity biochemical sensing because of their high <i>Q</i> factor and sensitivity <i>S</i>. In this paper, a Fano interference with high <i>Q</i> factor is designed based on a ring-column dimer array structure, where a layer of graphene is laid at the interface of silicon and silica. The influence of Fermi energy on resonance point is studied; the maximum <i>Q</i> factor of 892 and the FWHM = 1.65 nm are obtained respectively at the Fermi level <span>\\({E}_{f}\\)</span> = 0.5 eV of graphene. What is more, as a refractive index sensor, the structure can achieve a sensitivity of up to the 1520.1 nm RIU<sup>−1</sup>. In addition, the proposed structure has the advantages of simple structure and easy fabrication and has potential applications in optical switches and optical filters.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"19 5","pages":"2787 - 2794"},"PeriodicalIF":3.3000,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasmonics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s11468-024-02203-w","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Metasurfaces in all-dielectric are diffusely used in non-linear optical and high sensitivity biochemical sensing because of their high Q factor and sensitivity S. In this paper, a Fano interference with high Q factor is designed based on a ring-column dimer array structure, where a layer of graphene is laid at the interface of silicon and silica. The influence of Fermi energy on resonance point is studied; the maximum Q factor of 892 and the FWHM = 1.65 nm are obtained respectively at the Fermi level \({E}_{f}\) = 0.5 eV of graphene. What is more, as a refractive index sensor, the structure can achieve a sensitivity of up to the 1520.1 nm RIU−1. In addition, the proposed structure has the advantages of simple structure and easy fabrication and has potential applications in optical switches and optical filters.
期刊介绍：
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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