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基于层叠结构的双波段太赫兹超材料增透膜设计

Dual-Band Terahertz Metamaterial Antireflection Coating Based on Multilayered Structure

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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0.471 THz和1.560 THz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0.26 THz和0.21 THz。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。

Abstract

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 0.0028 and 0.0025 at 0.471 and 1.560 THz, respectively (with <10% reflectivity for the bandwidths of 0.26 and 0.21 THz). The results provide a reference for the applications of multi-band terahertz metamaterial antireflection coatings.

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DOI:10.3788/CJL201946.0614031

所属栏目:太赫兹技术

基金项目:国家自然科学基金;

收稿日期:2019-01-07

修改稿日期:2019-02-19

网络出版日期:2019-06-01

作者单位    点击查看

乔楠:北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044
延凤平:北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044
王伟:北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044
谭思宇:北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044
李广森:北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044

联系人作者:延凤平(fpyan@bjtu.edu.cn)

备注:国家自然科学基金;

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引用该论文

Nan Qiao,Fengping Yan,Wei Wang,Siyu Tan,Guangsen Li. Dual-Band Terahertz Metamaterial Antireflection Coating Based on Multilayered Structure[J]. Chinese Journal of Lasers, 2019, 46(6): 0614031

乔楠,延凤平,王伟,谭思宇,李广森. 基于层叠结构的双波段太赫兹超材料增透膜设计[J]. 中国激光, 2019, 46(6): 0614031

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