基于平行金属双柱的太赫兹波二维左手材料  

Two-Dimensional Left-Handed Material Based on Parallel Metallic Double Rods in Terahertz Wave

作　　者：梁兰菊[1] 闫昕[1] 姚建铨[2] 田贵才[1] 薛冬[1] 

机构地区：[1]枣庄学院光电工程学院,山东枣庄277160 [2]天津大学精密仪器与光电工程学院,天津300072

出　　处：《光学学报》2012年第3期154-159,共6页Acta Optica Sinica

基　　金：国家973计划(2007CB310403);山东省2011年高等学校科技计划(J11LG74);山东省2009年高等学校科技计划(J09LG56);枣庄市科学技术发展计划(201127);枣庄市科学技术发展计划(200926-5)资助课题

摘　　要：基于产生负介电常数的周期性金属线单元结构,利用平行金属双柱设计了具有双负通带的两种太赫兹波段二维左手材料。应用时域有限积分算法研究了二维左手材料的传输特性,仿真结果表明,在0.76THz附近,平行金属双柱的表面电荷振荡与反向平行电流引发了电磁谐振,出现良好的负折射效应。在0.75～0.78THz之间同时具有负等效磁导率和负等效介电常数,双负通带带宽约为0.03THz。进一步研究了金属双柱间距、长度及基板厚度等结构参数对双负通带带宽的影响。研究结果为太赫兹波段左手材料的设计和研制提供了参考。Negative permittivity can be realized from the periodic unit cells of the metallic bar structure. Two- dimensional left-handed material based on metal-rod pair structure is proposed. Propagation characteristics of two- dimensional left-handed material are studied by the time-domain finite integration method. Simulation shows that the structure has good left-handed property at the frequency of about 0.76 THz. Results indicate that this construction exhibits negative equivalent permittivity and permeability simultaneously in 0. 75 - 0. 78 THz, and the double negative pass band is 0.03 THz. Double negative pass band changing with structural parameter of metallic rod pairs is studied, indicating that it is related with the space between metallic rod pair, length and substrate thickness. The results provide a certain reference to design and study of left-handed material in terahertz range.

关 键 词：材料 光电子学 太赫兹波 左手材料 金属双柱 传输特性 

分 类 号：TN761[电子电信—电路与系统]