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首页> 外文期刊>Physical Review X >Controlling Gigahertz and Terahertz Surface Electromagnetic Waves with Metamaterial Resonators
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Controlling Gigahertz and Terahertz Surface Electromagnetic Waves with Metamaterial Resonators

机译：用超材料谐振器控制千兆赫和太赫兹表面电磁波

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We computationally and experimentally investigate the use of metamaterial resonators as bandpass filters and other components that enable control of guided surface electromagnetic waves. The guided surface electromagnetic wave propagates on a planar Goubau line, launched via a coplanar waveguide coupler with 50Ω impedance. Experimental samples targeted for either microwave or terahertz frequencies are measured and shown to be in excellent agreement with simulations. Metamaterial elements are designed to absorb energy only of the planar Goubau line and yield narrow-band resonances with relatively high quality factors. Two independent configurations of coupled metamaterial elements are demonstrated that modify the otherwise flat transmission spectrum of the planar Goubau line. By physically shunting the capacitive gaps of the coupled metamaterial elements, we demonstrate the potential for a large dynamic range in transmissivity, suggesting the use of this configuration for high-bandwidth terahertz communications.
机译：我们通过计算和实验研究了超材料谐振器作为带通滤波器和其他组件的使用，这些组件能够控制被引导的表面电磁波。被引导的表面电磁波在平面Goubau线上传播，并通过具有50Ω阻抗的共面波导耦合器发射。测量了针对微波或太赫兹频率的实验样品，结果表明它们与模拟非常吻合。超材料元素被设计为仅吸收平面Goubau线的能量并产生具有相对较高品质因数的窄带共振。演示了耦合的超材料元素的两个独立配置，这些配置修改了平面Goubau线的否则平坦的透射谱。通过在物理上分流耦合的超材料元素的电容间隙，我们证明了透射率具有较大动态范围的潜力，这表明该配置可用于高带宽太赫兹通信。

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