磁导率对光子晶体带隙特性的影响  

Influence on Band-Gap Properties of Photonic Crystal of Permeability

作　　者：刘靖[1] 孙军强[2] 黄重庆[1] 黄德修[2] 吴铭[2] 

机构地区：[1]湖南理工学院物理系,湖南岳阳410006 [2]华中科技大学武汉光电国家实验室,湖北武汉430074

出　　处：《光电子．激光》2007年第9期1085-1088,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60577006);湖南省教育厅科研计划资助项目(02C515)

摘　　要：利用时域有限差分(FDTD)法,计算了磁介质材料光子晶体(PC)的能带结构。结果表明,磁性散射也能形成光子禁带。增大PC构筑单元的磁导率,不仅能够增大带隙宽度,而且能够增加带隙个数和带隙深度。PC中引入磁性材料,增加了能带工程的调节自由度,为阻抗匹配设计提供了更多的可调参数,能更有效地吸收调频电磁干扰,对器件性能的改善具有广泛的应用价值。对其作用机理进行了探讨。Energy band structures of different magnetic dielectric photonic crystals（CD） are calculated by finite-difference time-domain（FDTD） method. The results demonstrate that photonic band gaps may be formed by magnetic scattering. By increasing the magnetic permeability of constituent dielectric layers,the band gap width can be enlarged, the number of the band gaps can be increased and the band gap depth can be augmented. With the introduction of magnetic material in PC,the adjustable freedom of energy band engineering is increased,in addition more tunable parameters are offered for impedance, and high-frequency electromagnetic interferences are absorbed effectively. These characteristics will have a broad application to improve the performance of optical devices.

关 键 词：磁导率 时域有限差分(FDTD)法 透射谱 带隙 光子晶体(PC) 

分 类 号：O731[理学—晶体学]