Coplanar waveguide wideband band-stop filter based on localized spoof surface plasmons.
Coplanar waveguide wideband band-stop filter based on localized spoof surface plasmons.
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DOI：
10.1364/ao.55.010323
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发表时间：
2016-12
期刊：
影响因子：
1.9
通讯作者：
Zhuo Li;Jia Xu;Cheng Chen;Yunhe Sun;Bing-zheng Xu;Liangliang Liu;C. Gu
中科院分区：
文献类型：
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作者：
Zhuo Li;Jia Xu;Cheng Chen;Yunhe Sun;Bing-zheng Xu;Liangliang Liu;C. Gu
本文报道了一种基于局域欺骗表面等离子体的宽带带阻等离子体滤波器，该滤波器由共面波导（CPW）和衬底背面带有缺陷单元的超薄周期性波纹金属带组成。缺陷单元用于定位沿CPW的传输能量。每个缺陷单元都可以引入一个窄阻带，并且一系列缺陷单元被明智地设计成一个宽带CPW带阻滤波器。滤波器的中心频率和带宽可以通过缺陷单元的高度和数量来调节。另外，设计了t型单元，增加侧支的等效高度，实现垂直几何尺寸的小型化。对该滤波器进行了理论分析，并制作了微波频率下的样品，以验证我们的设计。这种简单的带阻等离子体滤波器可以在微波和太赫兹频率的等离子体电路和天线中找到潜在的应用。
In this work, a wideband band-stop plasmonic filter based on localized spoof surface plasmons is reported, which consists of a coplanar waveguide (CPW) and an ultra-thin periodic corrugated metallic strip with defect units at the back of the substrate. Defect units are used to localize the transmission energy along the CPW. Each defect unit can introduce a narrow stop band, and a series of defect units is judiciously designed to form a broadband CPW band-stop filter. The center frequency and bandwidth of the filter can be tuned by the heights and numbers of the defect units. In addition, a T-shaped unit is designed to increase the equivalent height of the lateral branch so as to realize the miniaturization of the vertical geometric dimension. Theoretical analysis of the filter has been conducted, and a sample at microwave frequency has been fabricated and measured to validate our design. This simple band-stop plasmonic filter can find potential applications in plasmonic circuits and antennas at microwave and terahertz frequencies.