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首页> 美国卫生研究院文献>Scientific Reports >Spoof surface plasmon based planar antennas for the realization of Terahertz hotspots
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Spoof surface plasmon based planar antennas for the realization of Terahertz hotspots

机译：基于欺骗性表面等离子体激元的平面天线用于实现太赫兹热点

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摘要

Novel spoof surface plasmon based terahertz (THz) antennas are realized using a few number of rectangular grooves perforated in ultrathin metal stripes and the properties of them, including both scattering cross sections and field enhancement, are numerically analyzed. The dependence of these properties on the incident angle and groove number is discussed and the results show that sharp resonances in scattering cross section spectra associated with strong local field enhancement can be achieved. These resonances are due to the formation of Fabry-Perot resonances of the spoof surface plasmon mode and it is found that the order of resonance exhibiting strongest field enhancements is found to coincide with the number of grooves at normal incidence, due to hybridization of the antenna resonance with the individual groove resonance. The terahertz hotspots within the grooves at resonances due to the local field enhancement may open up new possibilities for the investigation of terahertz-matter interactions and boost a variety of THz applications including novel sensing and THz detections. The planar stripe antennas with sharper resonances than dipolar-like resonances, together with their ease of fabrication may also promise new design methodology for metamaterials.
机译：新型的基于欺骗性表面等离子体激元的太赫兹（THz）天线是利用在超薄金属条中穿孔的几个矩形凹槽实现的，并对其数值进行了分析，包括散射截面和场增强。讨论了这些特性对入射角和凹槽数的依赖性，结果表明，在散射截面光谱中，与强局部场增强相关的共振很强。这些共振是由于欺骗表面等离子体激元模式的Fabry-Perot共振而形成的，并且发现由于天线的杂交，表现出最强场增强的共振顺序与法向入射时的凹槽数量一致。共振与个别凹槽共振。由于局部场增强，共振时凹槽内的太赫兹热点可能为太赫兹-物质相互作用的研究开辟新的可能性，并促进各种THz应用，包括新颖的感测和THz检测。具有比偶极类谐振更尖锐的谐振的平面条纹天线，加上易于制造，也有望成为超材料的新设计方法。

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