Terahertz broadband band-stop filter based on metasurface

2019 IEEE International Conference on Electron Devices and Solid-State Circuits (EDSSC) Pub Date : 2019-07-12 DOI:10.1109/EDSSC.2019.8754263

H. Deng, M. Chan, Shaolin Zhou

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引用次数: 2

Abstract

The metasurface is an ultra-thin two-dimensional array of planar device composed of periodic meta-units to enable multi-functional and extraordinary electromagnetic control, and thus shows great potentials in many scientific and technical applications due to its excellent filtering characteristics when used as filters. For most applications, the filter bandwidth is one of the most important performance metrics. In this paper, we demonstrate a broadband terahertz band-stop filter based on the design principle of metasurface. By superposition of multi-layer metasurfaces and the interactive couplings in-between, the designed filter demonstrates a significantly broadened bandwidth and the stop-band rejection with excellent cut-off in the range of 373-502GHz. The result reveals the mechanism of bandwidth broadening through field distribution in the full-wave analysis by finite element simulation. Further study also reveals absolute polarization independence of the designed metasurface filter, i.e. exactly the same transmission spectra for TE or TM incidence.

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基于超表面的太赫兹宽带带阻滤波器

超表面是一种由周期性元单元组成的超薄二维平面器件阵列，可实现多功能和非凡的电磁控制，作为滤波器使用时具有优异的滤波特性，在许多科学技术应用中显示出巨大的潜力。对于大多数应用程序，滤波器带宽是最重要的性能指标之一。在本文中，我们展示了一个基于超表面设计原理的宽带太赫兹带阻滤波器。通过多层超表面的叠加和交互耦合，该滤波器在373-502GHz范围内具有明显的宽频带和良好的截止带抑制性能。通过有限元模拟，揭示了全波分析中通过场分布使带宽展宽的机理。进一步的研究还揭示了所设计的超表面滤波器的绝对偏振无关性，即TE或TM入射的透射光谱完全相同。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2019 IEEE International Conference on Electron Devices and Solid-State Circuits (EDSSC)

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