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Terahertz Metal-Graphene Composite Plasmon Waveguides Combining Strong Field Confinement with Low Cross-Talk: A FEM Study.

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Title: Terahertz Metal-Graphene Composite Plasmon Waveguides Combining Strong Field Confinement with Low Cross-Talk: A FEM Study.
Authors: Yang, Ya1 (AUTHOR), Zhang, Youjia2 (AUTHOR), Hu, Shuangxiao2 (AUTHOR), Yang, Nan2 (AUTHOR), Teng, Da2 (AUTHOR) 526613536@qq.com
Source: Plasmonics. Jun2025, Vol. 20 Issue 6, p3563-3571. 9p.
Subjects: Wave diffraction, Communication infrastructure, Finite element method, Fermi energy, Waveguides, Terahertz materials, Submillimeter waves
Abstract: Terahertz waves have great potential in next generation communications due to their broadband and high channel capacity. To integrate terahertz wireless links into fiber infrastructure, it is necessary to guide terahertz waves below the diffraction limit. To meet the demand for compact terahertz devices, here a metal-graphene composite plasmonic waveguide is proposed to realize strongly confined modal fields. The dependence of waveguide sizes and material properties on the mode characteristics of the proposed waveguide are studied by the finite element method. The results show that strongly confined modal fields could be achieved by changing the Si gap, and the normalized mode area could be as small as 3.84 × 10−6. Furthermore, the modal properties could be tuned by changing the Fermi energy of graphene. The investigation on cross-talk between adjacent structures shows that the integration spacing of this waveguide is less than 0.1 μm, indicating a high integration density. The proposed structure is capable of realizing various subwavelength functional terahertz devices that may meet the future demand of terahertz communication. [ABSTRACT FROM AUTHOR]
Copyright of Plasmonics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Terahertz Metal-Graphene Composite Plasmon Waveguides Combining Strong Field Confinement with Low Cross-Talk: A FEM Study.
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  Data: <searchLink fieldCode="JN" term="%22Plasmonics%22">Plasmonics</searchLink>. Jun2025, Vol. 20 Issue 6, p3563-3571. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Wave+diffraction%22">Wave diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Communication+infrastructure%22">Communication infrastructure</searchLink><br /><searchLink fieldCode="DE" term="%22Finite+element+method%22">Finite element method</searchLink><br /><searchLink fieldCode="DE" term="%22Fermi+energy%22">Fermi energy</searchLink><br /><searchLink fieldCode="DE" term="%22Waveguides%22">Waveguides</searchLink><br /><searchLink fieldCode="DE" term="%22Terahertz+materials%22">Terahertz materials</searchLink><br /><searchLink fieldCode="DE" term="%22Submillimeter+waves%22">Submillimeter waves</searchLink>
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  Data: Terahertz waves have great potential in next generation communications due to their broadband and high channel capacity. To integrate terahertz wireless links into fiber infrastructure, it is necessary to guide terahertz waves below the diffraction limit. To meet the demand for compact terahertz devices, here a metal-graphene composite plasmonic waveguide is proposed to realize strongly confined modal fields. The dependence of waveguide sizes and material properties on the mode characteristics of the proposed waveguide are studied by the finite element method. The results show that strongly confined modal fields could be achieved by changing the Si gap, and the normalized mode area could be as small as 3.84 × 10−6. Furthermore, the modal properties could be tuned by changing the Fermi energy of graphene. The investigation on cross-talk between adjacent structures shows that the integration spacing of this waveguide is less than 0.1 μm, indicating a high integration density. The proposed structure is capable of realizing various subwavelength functional terahertz devices that may meet the future demand of terahertz communication. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Plasmonics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11468-024-02564-2
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              Text: Jun2025
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