Flexible dual-band band-stop metamaterials filter for the terahertz region
Flexible dual-band band-stop metamaterials filter for the terahertz region
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适用于太赫兹区域的柔性双带带阻超材料滤波器
DOI：
10.1364/ome.7.001656
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发表时间：
2017-05-01
影响因子：
2.8
通讯作者：
Duan Junping
中科院分区：
文献类型：
--
作者：
Wang Junlin;Zhang Binzhen;Duan Junping
在本文中，我们提出了一种基于柔性聚酰亚胺晶片顶部周期性金属谐振结构的具有两个独立阻带的THzMMS滤波器。利用CST 2015全波有限积分技术进行了大量的数值模拟，得到了优化的几何参数。该滤波器的谐振频率分别为126.32 GHz和177.32 GHz，3分贝带宽分别为19.3GHz和9.1GHz。S21参数可达到-47.38分贝和-56.69分贝，对应两个谐振峰，具有良好的阻带性能。由于所提出的谐振结构的对称性，我们设计的MMS滤波器对入射电磁波的偏振角不敏感。为了深入了解所提出的MMS滤波器的传输性能，根据不同的介电常数、单元周期、介质厚度和几何尺寸进行了大量的仿真。分析了电场和表面电流的分布，以了解电磁波的传播机理。所提出的MMS滤波器是用表面微加工工艺制造的，并使用THz-TDS系统进行了测试。实验测得的MMS双频带阻滤波器的太赫兹传输响应与仿真结果吻合较好。(C)2017年美国光学学会
In this paper, we present a THZ MMs filter with two independent stop-bands based on periodic metallic resonant structures patterned on the top of a flexible polyimide wafer. The optimized geometry parameters were obtained by numerous simulations using full wave finite integration technology of CST 2015. The resonant frequencies of the filter were 126.32 GHZ and 177.32 GHZ with 3-dB bandwidths of 19.3 GHZ and 9.1 GHZ, respectively. The S21 parameters can reach to -47.38 dB and -56.69 dB corresponding to two resonant peaks, which indicate the excellent stop-band performance. The MMs filter in our design is insensitive to the polarization angle of the incident EM waves due to the symmetrical characteristic of the proposed resonance structure. In order to intensively understand the transmission performance of the proposed MMs filter, a large number of simulations were performed based on the different permittivity, period of the unit cell, dielectric thickness, and geometric dimensions. The electric field and surface current distributions were analyzed to understand the mechanism of the EM wave transmission. The proposed MMs filter was fabricated using a surface micromachining process and tested using a THZ-TDS system. Measured terahertz transmission responses of the proposed MMs dual-band band-stop filter have reasonable correspondence with those from simulations. (C) 2017 Optical Society of America