摘要
提出并设计了一种极化不敏感的柔性双阻带太赫兹超材料滤波器,并采用CST 2015仿真软件对该滤波器的结构进行仿真;为深入研究超材料滤波器的传输特性,分别对该超材料滤波器在2个谐振吸收峰处的电场强度和表面电流分布进行仿真;为验证仿真结果的正确性,采用微加工工艺制备了超材料滤波器样品,使用太赫兹时域光谱系统对其传输特性进行测试。仿真结果表明:该滤波器在0.131THz和0.182THz处获得了3dB带宽分别为15GHz和10GHz的2个阻带,并且在这2个谐振频率点的传输系数S21可以达到-43.56dB和-48.76dB,表现出了良好的阻带特性;测试结果与仿真结果比较吻合。
A flexible dual-stopband terahertz metamaterial filter with polarization insensitivity is proposed and designed.CST 2015 simulation software is used to simulate the structure of the designed metamaterial filter.To further study transmission characteristics of the metamaterial filter,we simulate the electric field intensities and surface current distributions of the metamaterial filter,respectively.To verify the validity of simulation results,we prepare a metamaterial filter sample by using the micro-manufacturing technology,and measure the transmission performance of the filter by using the terahertz time-domain spectroscopy（THz-TDS）system.The results show that the filter has two stopbands with 3 dB bandwidth of 15 GHz and 10 GHz at resonance points when the resonance frequencies are 0.131 THz and 0.182 THz,respectively.The transmission coefficient S21 at the two resonance points can reach-43.56 dB and-48.76 dB,and the filter shows good stopband characteristics.The measured results accord with the simulated ones.
作者
王俊林
张斌珍
段俊萍
王鑫
Wang Junlin;Zhang Binzhen;Duan Junping;Wang Xin(Key Laboratory of Instrumentation Science ＆ Dynamic Measurement, Ministry of Education, School of Instrument and Electronics, North University of China, Taiyuan, Shanxi 030051, China;Department of Information Engineering, Ordos Institute of Technology, Ordos, Nei Monggol 017000, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2017年第10期249-255,共7页
Acta Optica Sinica
基金
国家自然科学基金(51475438
61401405
U1637212)
山西省自然科学基金(2014011021-4)
山西省留学人员科技活动项目(20150603ZX)
内蒙古自治区高等学校科学研究项目(NJZY16378)
关键词
材料
超材料滤波器
太赫兹光学
微机电系统
谐振
极化
materials
metamaterial filter
terahertz optics
micro electro mechanical system
resonance
polarization
