基于手性超材料的太赫兹波非对称传输的研究  

A study of asymmetric transmission of terahertz waves based on chiral metamaterials

作　　者：王锋[1,2] 刘星辰[2] 王政平[2] 史金辉[2] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2015年第12期1638-1641,共4页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(61201083)

摘　　要：为了研究人工电磁超材料的太赫兹波非对称传输特性,设计了一种基于双层连续U形结构的人工电磁超材料,并利用有限元法数值仿真技术研究分析了其非对称传输特性,结果表明在谐振频率为2.9 THz时非对称传输系数可达0.77,由此可知此结构在太赫兹波段具有较好的非对称传输特性;同时对其结构参数进行了优化,选取出合理的结构参数以获得优异的超材料性能。基于双层连续U形结构人工电磁超材料的太赫兹非对称传输器具有结构简单、成本低、制备容易等优点,对实现太赫兹滤波器、太赫兹开关等超材料功能器件具有重大意义。In order to study the THz waves asymmetric transmission characteristics of artificial electromagnetic recta- materials, a metamaterial was designed and constructed in the form of a bilayered continuous U-shaped structure. Its THz waves asymmetric transmission characteristics were then analyzed using finite element simulation. The results show that the asymmetric transmission coefficient can reach 0.77 at around 2.9 THz, with good asymmetric transmission characteristics in the THz waves frequencies. Furthermore, structural parameters of the metamaterial were optimized to obtain promising performance. The THz waves asymmetric transmission device has many advantages, such as simple structure, low cost and easy fabrication. It could provide an important opportunity for developing various metamaterial-based functional devices, for instance, THz waves filters and switches.

关 键 词：电磁超材料 数值仿真 非对称传输 太赫兹波 手性 结构参数 

分 类 号：O431[机械工程—光学工程]