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Guided modes in asymmetric negative-zero-positive index metamaterial waveguide in the terahertz regime

机译:太赫兹状态下非对称负零正折射率超材料波导中的导模

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摘要

An asymmetric negative-zero-positive index metamaterial (NZPIM) waveguide with two different Dirac points (DPs) operating in the terahertz (THz) regime is proposed. Its propagating characteristics are investigated by using the graphical method. Due to the linear dispersion near the DPs, the asymmetric NZPIM waveguide exhibits unique properties of guided modes, which are different from that in conventional waveguide but similar to that of electron waves in graphene waveguides. It is shown that the guided mode properties can be tuned by adjusting the incident angular frequency. In addition, the properties of surface-guided modes are also discussed. Our work may have potential applications in THz functional devices as well as reference value in investigating the guided modes Of electrons in graphene waveguides.
机译:提出了一种非对称负零正折射率超材料(NZPIM)波导,该波导具有在太赫兹(THz)体制下运行的两个不同的狄拉克点(DP)。使用图形方法研究其传播特性。由于DP附近的线性色散,非对称NZPIM波导具有独特的导模特性,与常规波导不同,但与石墨烯波导中的电子波相似。结果表明,可以通过调整入射角频率来调整引导模式属性。此外,还讨论了表面引导模式的特性。我们的工作可能在太赫兹功能器件中具有潜在的应用,以及在研究石墨烯波导中电子的传导模式方面的参考价值。

著录项

  • 来源
    《Optical engineering》 |2014年第4期|045102.1-045102.7|共7页
  • 作者单位

    Tianjin University, College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Optoelectronic Information Science and Technology, Institute of Laser and Opto-electronics, Tianjin 300072, China;

    Tianjin University, College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Optoelectronic Information Science and Technology, Institute of Laser and Opto-electronics, Tianjin 300072, China;

    Tianjin University, College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Optoelectronic Information Science and Technology, Institute of Laser and Opto-electronics, Tianjin 300072, China;

    Tianjin University, College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Optoelectronic Information Science and Technology, Institute of Laser and Opto-electronics, Tianjin 300072, China;

    Tianjin University, College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Optoelectronic Information Science and Technology, Institute of Laser and Opto-electronics, Tianjin 300072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    terahertz; Dirac points; negative-zero-positive index metamaterials; waveguide;

    机译:太赫兹狄拉克积分;负零正指数超材料波导;

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