电流变液调控的连通树枝状结构左手材料  

Tunable effects of connective dendritic left-handed metamaterials based on electrorheological fluids

作　　者：罗春荣[1] 王连胜[1] 郭继权[1] 黄勇[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学电流变技术研究所,西安710072

出　　处：《物理学报》2009年第5期3214-3219,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:50632030);国家重点基础研究发展计划(批准号:2004CB719805);国防基础科研项目资助的课题~~

摘　　要：设计了结构单元连通的单一树枝状结构材料模型,通过把连通的树枝状结构材料置于高性能电流变液中,研究了电极间距、内嵌介质的介电常数以及电场强度等对浸入电流变液中树枝状结构左手材料透射峰的影响.实验结果表明,电极间距对样品的左手峰有重要的影响;在容器盒中充满电流变液之后样品的左手峰向低频方向移动;通过改变外加电场强度可以调节左手透射峰,最大调节范围可达140MHz.We experimentally studied the tunable effects of connective dendritic left-handed metamaterials based on electrorheological fluids. Three influencing factors-the distance of electrodes, the permittivity of embedding media, and the intensity of applied electric fields-are discussed respectively. The experimental results show that the distance of electrodes exhibits an important effect on the transmission peak of the samples. The left-handed transmission peak shifts to lower frequency when the electrorheological fluids infiltrate. Moreover, by changing the intensity of electric field, the left-handed transmission peak can be modulated actively,and the maximum shift is up to 140 MHz.

关 键 词：连通树枝结构 电流变液 介电常数 左手峰 

分 类 号：O441.6[理学—电磁学]