类H型结构的太赫兹带阻滤波器  

Terahertz band-stop filter with H-type structure

作　　者：陈祥雪 付子亲 王凤超 陈进 杨晶 CHEN Xiang-xue;FU Zi-qin;WANG Feng-chao;CHEN Jin;YANG Jing(College of Sciences,Shanghai Institute of Technology,Shanghai 201418,China)

机构地区：[1]上海应用技术大学理学院,上海201418

出　　处：《中国光学（中英文）》2024年第4期757-763,共7页Chinese Optics

基　　金：上海应用技术大学协同创新基金(No.XTCX2020-12);上海应用技术大学中青年科技人才发展基金(No.ZQ2022-6,No.ZQ2024-12)。

摘　　要：本文基于对称的类H型结构设计了一种超材料太赫兹带阻滤波器,这种H型结构的连续金属臂可以流通电流。利用电磁仿真软件CST Microwave Studio 2021研究了该滤波器的滤波特性。通过改变H型双臂间距臂长、周期长度、双H间距离等,确定了滤波器的几何参数。结果表明,该结构可实现偏振选择的功能,在y偏振条件下,滤波器在0.2~2.3 THz范围内没有明显的谐振峰,但透过率范围在-15到-3 dB之间。而在x偏振条件下,在中心频率1.34 THz处可获得FWHM带宽为0.15 THz的一个阻带,传输参数约为-30 dB。最后,采用微加工工艺制备了超材料滤波器样品以验证仿真结果,使用透射式太赫兹时域光谱系统对样品进行测试,测试结果与仿真结果吻合较好。In this paper,a terahertz band-stop filter based on a symmetrical H-type structure was designed,the continuous metal arms of which can flow current.By using electromagnetic simulation software CST Mi-crowave Studio 2021,the filtering characteristics of the filter were studied,and the geometric parameters of the filter were determined by changing the arm length,period length and gap of double H.The results show that the filter can realize the tunable polarization properties.Under the y-polarization condition,the transmis-sion spectrum has no obvious resonance peak in the range of 0.2-2.3 THz,but the intensity ranges from-15 dB to-3 dB.Under the x-polarization condition,a remarkably sharp dipole resonance valley occurs at 1.34 THz in the transmission spectrum,and the bandwidth and intensity are 0.15 THz and-30 dB,respect-ively.In order to verify the simulation results,the designed metamaterial filter was fabricated using microma-chining technology,and the sample was tested by transmissed-terahertz time-domain spectroscopy(THz-TDS)system.The experiment results are in good agreement with the simulation results,which verifies the feasibility of this method.

关 键 词：太赫兹 超材料 类H型结构 带阻滤波器 

分 类 号：TN248[电子电信—物理电子学]