光子晶体中的磁控光子开关线路  

Magnetron photonic switching circuit in photonic crystal

作　　者：毕海星[1] 周云松[1] 赵丽明[1] 王福合[1] 

机构地区：[1]首都师范大学物理系,北京100037

出　　处：《物理学报》2008年第9期5718-5721,共4页Acta Physica Sinica

基　　金：北京市教委科技发展基金(批准号:KM200710028006)资助的课题~~

摘　　要：提出了一个光子晶体中的磁控光子开关线路的理论模型,并利用平面波展开加超原胞方法计算了它的光学性质.这个模型由设置在空气中的介电柱子光子晶体构成,其中一排柱子被具有同样介电常数的铁氧体柱子替换.当外加磁场时,铁氧体柱子产生了不等于一的磁导率,这就会在光子带隙中产生波导模.当撤去外场,整个体系还原为完美光子晶体.由此便可形成磁控光子开关线路.具体选择了正方形柱子设置在正方形格点上,计算结果证明这种设想是可行的,并给出一些有价值的结果.We proposed a theoretical model of magnetron photonic switching circuit （MPSC） in photonic crystal （PC） and investigated the properties of MPSC using the plane wave expansion method in combination with supercell method. This model is a PC composed of dielectric pillars set in air, in which one row of dielectric pillars is replaced by ferrite material with the dielectric constant same as that of the original dielectric pillars. When external static magnetic field is applied, the permeability of the ferrite pillars will not be equal to one and guide modes along the row of ferrite pillars may be generated in band gap. When the external field is removed, this system reverts to a perfect PC. Thus, this system forms a photonic switching circuit controlled by the external field. In calculation, we take square pillars set in square lattice. The calculation results show that this MPSC is reasonable and realizable, and some valuable results are obtained.

关 键 词：光子晶体 传导模 磁导率 

分 类 号：TN25[电子电信—物理电子学]