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Edge and waveguide terahertz surface plasmon modes in graphene microribbons

机译:石墨烯微带中的边缘和波导太赫兹表面等离振子模式

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摘要

Surface plasmon modes supported by graphene ribbon waveguides are studied and classified. The properties of both modes with the field concentration within the ribbon area (waveguiding modes) and on the edges (edge modes) are discussed. The waveguide and edge modes are shown to be separated from each other by a gap in wave numbers. The even-parity hybridized edge mode results to be the fundamental electromagnetic mode of the ribbon, possessing also the lowest losses. All of the plasmonic modes in the ribbons have an optimum frequency, at which the absorption losses are minimum, due to compromise between the plasmon confinement and the decrease of the group velocity close to the modal cutoff. The presented results show that the diffraction limit in graphene ribbons can be surpassed.
机译:对石墨烯带状波导所支持的表面等离子体激元模式进行了研究和分类。讨论了带状区域(波导模式)和边缘(边缘模式)的场集中的两种模式的特性。波导模式和边缘模式显示为通过波数间隙彼此分离。结果,偶数奇偶混合边缘模式成为碳带的基本电磁模式,同时损耗也最低。条带中的所有等离激元模式都具有最佳频率,在该频率下,由于等离激元限制和接近模态截止的群速度下降之间的折衷,吸收损耗最小。给出的结果表明,可以超过石墨烯带的衍射极限。

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  • 来源
    《Physical review》 |2011年第16期|p.161407.1-161407.4|共4页
  • 作者单位

    Instituto de Ciencia de Materiales de Aragon and Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza,E-50009, Zaragoza, Spain,A. Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 12 Academician Proskura Street,61085 Kharkov, Ukraine;

    Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid, Spain;

    Departamento de Fisica Teorica de la Materia Condensada, Universidad Autonoma de Madrid, E-28049 Madrid, Spain;

    Instituto de Ciencia de Materiales de Aragon and Departamento de Fisica de la Materia Condensada, CSIC-Universidad de Zaragoza,E-50009, Zaragoza, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    metals and metallic alloys; wave propagation, transmission and absorption; electromagnetic wave propagation; radiowave propagation; apertures, collimators;

    机译:金属和金属合金;波的传播;传输和吸收;电磁波的传播;无线电波传播;孔径;准直仪;

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