{"title":"An Investigation of Low-Loss Sodium Plasmon Waveguides Based on FEM","authors":"Xiaodi Yang, Shuaiqi Ma, Da Teng","doi":"10.1007/s11468-024-02457-4","DOIUrl":null,"url":null,"abstract":"<p>A sodium-based hybrid plasmonic waveguide consists of the Na film and wedge-shape Si ridge waveguide is designed. The overall performance of the waveguide and its application as a nano-laser are studied by using the finite element method (FEM) with emphasis on effective index, propagation length, normalized mode area, figure of merit, confinement factor, gain threshold, and Purcell factor. The results point out that the designed waveguide exhibits the strong field confinement ability as well as high figure of merit. Particularly, a large Purcell factor of 536 and an ultra-low gain threshold of 0.066 μm<sup>−1</sup> could be concurrently obtained, which is far smaller than that of conventional Ag-based plasmonic waveguides. The proposed waveguide could potentially advance the utilization of sodium-based plasmonic waveguides in the field of nano-laser, resonator, modulator, and other nanophotonic devices.</p>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Plasmonics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1007/s11468-024-02457-4","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
A sodium-based hybrid plasmonic waveguide consists of the Na film and wedge-shape Si ridge waveguide is designed. The overall performance of the waveguide and its application as a nano-laser are studied by using the finite element method (FEM) with emphasis on effective index, propagation length, normalized mode area, figure of merit, confinement factor, gain threshold, and Purcell factor. The results point out that the designed waveguide exhibits the strong field confinement ability as well as high figure of merit. Particularly, a large Purcell factor of 536 and an ultra-low gain threshold of 0.066 μm−1 could be concurrently obtained, which is far smaller than that of conventional Ag-based plasmonic waveguides. The proposed waveguide could potentially advance the utilization of sodium-based plasmonic waveguides in the field of nano-laser, resonator, modulator, and other nanophotonic devices.
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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