Spoof plasmonic waveguide developed from coplanar stripline for strongly confined terahertz propagation and its application in microwave filters
Spoof plasmonic waveguide developed from coplanar stripline for strongly confined terahertz propagation and its application in microwave filters
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强约束太赫兹传播的共面带状线欺骗等离子体波导及其在微波滤波器中的应用
DOI：
10.1364/oe.26.010589
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发表时间：
2018-04-16
期刊：
影响因子：
3.8
通讯作者：
Tang, Xiaohong
中科院分区：
文献类型：
--
作者：
Guo, Ying Jiang;Xu, Kai Da;Tang, Xiaohong
基于欺骗表面等离子激元（SSPP）的概念，首次提出了一种新型的平面太赫兹等离子激元波导，该波导由共面带状线（CPS）制成，可以实现强限制的太赫兹传播性能。利用本征模模拟技术和时域有限差分法对该等离子体波导的导波特性进行了理论研究。结果表明，通过设计SSPP单胞，可以直接控制波导的传输特性，该单胞具有渐近频率的灵活调谐能力和强的太赫兹场限制.通过放大所提出结构的几何尺寸，在微波频率范围内进行了滤波器实验，验证了这一想法。测试结果表明，该超宽带滤波器具有很高的性能，在3 ~ 13.1GHz范围内，反射系数优于-10dB，最小插入损耗为2.2dB，最大插入损耗为5.6dB。本文提出了一种基于CPS的新型SSPP波导，实现了强场约束的THz波传输。其在各种集成THz等离子体激元器件中可能具有很好的潜在应用。(C)根据OSA开放获取出版协议的条款，2018年美国光学学会
A novel planar terahertz (THz) plasmonic waveguide developed from coplanar stripline (CPS) is proposed for the first time to achieve strongly confined THz propagation performance based on the concept of spoof surface plasmon polaritons (SSPP). Guided-wave characteristics of the proposed plasmonic waveguide are theoretically investigated by eigen-mode simulation technique and finite-difference time-domain solutions. It is found that the waveguide propagation characteristics can be directly manipulated by designing the SSPP unit cells, which exhibit flexible tuning ability of the asymptotic frequency and strong THz field confinement. The idea has been validated through fabricated filter experiments in microwave frequency regime by scaling up the geometry size of the proposed structure. The measured results illustrate high performance of the ultra-wideband filter, in which the reflection coefficient is better than -10 dB from 3 to 13.1 GHz with the smallest and worst insertion losses of 2.2 dB and 5.6 dB, respectively. This work presents a new SSPP waveguide developed from CPS to realize the THz-wave propagation with strong field confinement. which may have promising potential applications in various integrated THz plasmonic devices. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement