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High-efficiency broadband excitation and propagation of second-mode spoof surface plasmon polaritons by a complementary structure

机译：通过互补结构，高效宽带激励和第二模欺骗表面等离子体极化子的传播

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摘要

A complementary structure based on coplanar waveguides (CPWs) with periodical etching slots is proposed to support spoof surface plasmon polaritons (SSPPs). In contrast to the traditional slotline-based complementary SSPP structure, a dispersion curve of the second mode by the proposed structure has a much lower starting point from the origin which exhibits greatly improved operating bandwidth. Moreover, tighter confinements of SSPPs in the region of small wave vectors corresponding to lower frequencies can be predicted from the dispersion analysis, which means enhancement of transmission efficiency. Then a simple and efficient transition structure with tapered CPWs and gradient slots is proposed to realize high-efficiency and broadband excitation of the second mode of SSPPs for the first time, to the best of our knowledge. Based on the proposed structure, a seamless connection between CPWs and the SSPP structure can be achieved. The measured insertion loss and return loss below 6.6 GHz is better than -0.86 and -13.62 dB, respectively. Furthermore, it can be seen from the measurement results that a 3 dB bandwidth ranges from 0 to 10.57 GHz, and the return loss is better than -10 dB from 0 to 8.96 GHz. The proposed structure can promote the development of plasmonic integrate circuits and functional devices at microwave frequencies. (C) 2017 Optical Society of America
机译：提出了一种基于共面波导（CPW）的互补结构，其具有周期蚀刻槽，以支持欺骗表面等离子体极化子（SSPP）。与基于传统的Slotline的互补SSPP结构相反，所提出的结构的第二模式的色散曲线具有来自原点的起点远低点，该起点呈现出大大改善的操作带宽。此外，可以从分散分析预测对应于较低频率的小波矢量区域中的SSPP的紧密限制，这意味着增强传输效率。然后，提出了一种简单且有效的过渡结构，具有锥形CPW和梯度槽，首次实现SSPP的第二种模式的高效和宽带激发，以我们的知识中的最佳方式。基于所提出的结构，可以实现CPW和SSPP结构之间的无缝连接。测得的插入损耗和返回损耗分别优于-0.86和-13.62 dB。此外，从测量结果可以看出，3 dB带宽范围为0到10.57 GHz，并且返回损耗从0到8.96GHz优于-10 dB。所提出的结构可以促进微波频率下的等离子体整合电路和功能装置的发展。 （c）2017年光学学会

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  • 来源
    《Optics Letters》 |2017年第14期|共4页
  • 作者

    Zhang Dawei; Zhang Kuang; Wu Qun; Yang Guohui; Sha Xuejun;

  • 作者单位

    Harbin Inst Technol Dept Microwave Engn Harbin 150001 Peoples R China;

    Harbin Inst Technol Dept Microwave Engn Harbin 150001 Peoples R China;

    Harbin Inst Technol Dept Microwave Engn Harbin 150001 Peoples R China;

    Harbin Inst Technol Dept Microwave Engn Harbin 150001 Peoples R China;

    Harbin Inst Technol Commun Res Ctr Harbin 150001 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
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