线电流源激励下正多边形双负介质柱的聚焦特性  

Focus character for double-negative dielectric volume with regular polygon structure under electric line source

作　　者：胡宝晶[1] 黄铭[1] 杨晶晶[2] 张剑龙[1] 彭金辉[2] 

机构地区：[1]云南大学信息学院,昆明650091 [2]昆明理工大学材料与冶金工程学院,昆明650093

出　　处：《强激光与粒子束》2008年第2期301-303,共3页High Power Laser and Particle Beams

基　　金：高等学校博士学科点专项科研基金资助课题(20050674009)

摘　　要：利用时域有限差分法分别分析了线电流源激励下,正三角形、正四边形和正六边形双负介质柱的近场分布。发现对于介电常数和磁导率都很小且无耗的双负介质柱,当激励位于正多边形顶角角平分线的外延长线上时,在双负介质柱内部不会出现焦点。将该电磁模型同Arslanagic等人介绍的方法进行了比较,证明了电磁模型的有效性。Focus character for double-negative dielectric volume with regular triangular, square and hexagonal structure under electric line source is analyzed using finite difference time domain method. The computation results show that ＂focus＂does not exist in the double-negative dielectric volume, when the excitation is located on the outside extension line of angular bisector of corner angle in double-negative volume with very small permitivity and permeability. The results are compared with Arslanagic＇s analytic results and their validity is proved.

关 键 词：双负介质 线电流源 聚焦特性 透镜效应 

分 类 号：TN011[电子电信—物理电子学]