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Design of Broad Stopband Filters Based on Multilayer Electromagnetically Induced Transparency Metamaterial Structures

机译:基于多层电磁感应透明超材料结构的宽带阻带滤波器设计

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摘要

Broad stopband filters are proposed, based on multilayer electromagnetically induced transparency (EIT) metamaterial structures. The single EIT metamaterial consists of a U-shaped resonator and a strip on a polyimide substrate. The EIT-like spectral feature is firstly utilized to achieve stopband filters by properly coupling two layers of EIT structure. Influences of different rotation angles on the transmission properties of the two-layer EIT structure are investigated. It is found the wider low-transmission band can be obtained for the Transverse Magnetic (TM) polarization when the two EIT metal structures are vertical to each other. Furthermore, the bandwidth of the stopband can be controlled by increasing layers of the EIT structures with the proper architectural design. The design using a coupling effect of multi EIT-like resonances in the metamaterial would provide a new method for broad stopband filters in highly integrated optical circuits.
机译:基于多层电磁感应透明(EIT)超材料结构,提出了宽阻带滤波器。单个EIT超材料由U形谐振器和聚酰亚胺基板上的条带组成。首先,通过适当地耦合两层EIT结构,利用类EIT的频谱特征来实现阻带滤波器。研究了不同旋转角度对两层EIT结构透射特性的影响。发现当两个EIT金属结构彼此垂直时,对于横向磁极化可以获得更宽的低透射带。此外,可以通过使用适当的体系结构设计增加EIT结构的层数来控制阻带的带宽。在超材料中利用多个类EIT共振的耦合效应进行的设计将为高度集成的光学电路中的宽阻带滤波器提供一种新方法。

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