二维正方格子磁性光子晶体的带隙结构  

PBG structures of two-dimensional magnetic photonic crystals in square lattice

作　　者：车明[1] 周云松[1] 王福合[1] 顾本源 

机构地区：[1]首都师范大学物理系,北京100037 [2]中国科学院物理研究所,北京100080

出　　处：《物理学报》2005年第10期4770-4775,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:001CB61040);北京市教育委员会科技发展计划面上项目(批准号:KM200310028108)资助的课题.~~

摘　　要：采用平面波展开的方法计算了正方格子二维磁性光子晶体(MPC)的光子带隙结构.散射子的形状分别为长方形,正方形,六角形和圆形.通过调节磁导率,填充率和散射子的旋转角度,找到了MPC各种结构的最大的绝对带隙宽高比ωR.研究发现随着磁导率的增加,MPC绝对带隙中心频率ωg单调减小,绝对带隙宽度Δω和其宽高比ωR可能不同时达到最大值.而随着填充率或者散射子旋转角的增加,基本不改变ωg的大小,各种结构的Δω和ωR同时达到最大值.Photonic band gap（PBG） structures of the two-dimensional magnetic photonic crystals （MPCs） are calculated by use of the plane-wave expansion method. The MPCs consist of magnetic pillars in rectangular, square, hexagonal and circular shapes, respectively embedded in dielectric medium in a square lattice. The optimal MPC samples that possess the largest gap-mid gap ratio for each type of MPC are obtained by scanning the three parameters（permeability, filling factor and rotating angle）. The changes of the PBG structures are investigated when varying independently each parameter and fixing the others. Calculated results show that the frequency in the middle of the PBG hardly changes with the variation in filling factor or rotating angle, but decreases monotonicly with the increase of the permeability. The PBG width increases to a top value and then decreases with the increase of each parameter.

关 键 词：磁性光子晶体 光子带隙结构 二维磁性 光子晶体 正方格子 旋转角度 平面波展开 中心频率 带隙宽度 磁导率 

分 类 号：O734[理学—晶体学]