In this work, we proposed an ultra-wideband absorber using the dispersion characteristics of spoof surface plasmon polaritons (SSPP). The electromagnetic waves propagating on the SSPP structure have extremely slow group velocity and are confined in the sub-wavelength regions near the asymptotic frequency of the SSPP, and that electromagnetic energy can be absorbed by the high-lossy substrate and lumped resistors. The metallic strips of the SSPP structure are vertically bended and loaded with lumped resistors, and their lengths are linearly varied. This absorber performs excellent absorption ability, including ultra-wideband absorption, almost polarization insensitive performance, and high absorptivity under large incident angles for both transverse magnetic and transverse electronic waves. Based on the simulation analysis, an absorber sample was fabricated and measured, and the simulated and measured results are consistent with each other, validating the design method.

中文翻译：

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基于欺骗表面等离子体激元的大入射角电磁波超宽带吸收体

在这项工作中，我们利用欺骗表面等离子体激元（SSPP）的色散特性提出了一种超宽带吸收器。在 SSPP 结构上传播的电磁波具有极慢的群速度，并且被限制在 SSPP 渐近频率附近的亚波长区域，并且电磁能量可以被高损耗衬底和集总电阻吸收。SSPP 结构的金属条垂直弯曲并加载集总电阻器，它们的长度线性变化。该吸收体具有优异的吸收能力，包括超宽带吸收、几乎对偏振不敏感的性能以及在大入射角下对横向磁波和横向电子波的高吸收率。根据仿真分析，