摘要
设计了一种双波段太赫兹超材料增透膜结构,该增透膜采用层叠结构,即由两层金属-聚合物构成。通过数值计算得到了两层金属-聚合物结构金属表面的电场分布,分析了两波段超低反射产生的机理,并通过优化聚合物层的厚度与金属单元结构的尺寸,实现了在0.471THz和1.560THz两个频点处的超低反射,反射率最低分别为0.0028和0.0025,反射率在10%以内的带宽分别为0.26THz和0.21THz。研究结果为实现多波段太赫兹超材料增透膜应用提供了参考。
This paper presents the design of a dual-band terahertz metamaterial antireflection coating with a multilayered structure(two layers of metal-polyimide).The formation of the two low-reflectivity bands is analyzed by numerically calculating the electric field distributions on metal surfaces of the two layer of metal-polyimide structure.After adjusting the thickness of the polyimide layer and the size of the metal unit structure,ultra-low reflectivity is achieved with the minimum percentages of 0.0028and 0.0025at 0.471and 1.560THz,respectively (with <10% reflectivity for the bandwidths of 0.26and 0.21THz).The results provide a reference for the applications of multi-band terahertz metamaterial antireflection coatings.
作者
乔楠
延凤平
王伟
谭思宇
李广森
Qiao Nan;Yan Fengping;Wang Wei;Tan Siyu;Li Guangsen(Key Laboratory of All Optical Network and Advanced Communication Networks,Ministry of Education,Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2019年第6期278-284,共7页
Chinese Journal of Lasers
基金
国家自然科学基金(61827818,61620106014)
关键词
太赫兹技术
超材料
双波段
增透膜
耦合
terahertz technology
metamaterial
dual-band
antireflection coating
coupling
