{"title":"Surface Plasmon Filter Based on Metal–Insulator-Metal Waveguide with Multi-Stopband and High Filtering Efficiency","authors":"Rui Peng, Shasha Wang, Zhengping Zhang, Xin Yang","doi":"10.1007/s11468-023-02112-4","DOIUrl":null,"url":null,"abstract":"<div><p>In order to meet the demand for multi-stopband filters and high filtering efficiency in optical nanodevices, a surface plasmon band-stop filter coupled with a straight waveguide and an arch-type resonator is proposed in this paper. Simulation analysis of visible and near-infrared spectra and field distribution using the finite element method shows that the transmittance spectrum of this structure has five stop bands in the 800 nm band range with a minimum transmittance of 9.10%; when the key parameters such as the bottom size of the resonant cavity are changed, the transmission curves are red-shifted and the performance of some of the stop bands is significantly enhanced; the sensitivity, quality factor and figure of merit can reach 1780 nm/RIU, 108.86 and 102.49 RIU<sup>−1</sup>, respectively. Finally, two optimized structures are proposed to further enhance the filter performance, allowing a minimum transmittance as low as 0.41%. The filter has a wide application prospect in optical integrated circuits.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"19 4","pages":"1977 - 1988"},"PeriodicalIF":3.3000,"publicationDate":"2023-11-28","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/s11468-023-02112-4","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
In order to meet the demand for multi-stopband filters and high filtering efficiency in optical nanodevices, a surface plasmon band-stop filter coupled with a straight waveguide and an arch-type resonator is proposed in this paper. Simulation analysis of visible and near-infrared spectra and field distribution using the finite element method shows that the transmittance spectrum of this structure has five stop bands in the 800 nm band range with a minimum transmittance of 9.10%; when the key parameters such as the bottom size of the resonant cavity are changed, the transmission curves are red-shifted and the performance of some of the stop bands is significantly enhanced; the sensitivity, quality factor and figure of merit can reach 1780 nm/RIU, 108.86 and 102.49 RIU−1, respectively. Finally, two optimized structures are proposed to further enhance the filter performance, allowing a minimum transmittance as low as 0.41%. The filter has a wide application prospect in optical integrated circuits.
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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