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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.
A theoretical model of magnetron photonic switch circuit in photonic crystal was proposed and its optical properties were calculated by plane wave expansion plus superplastif method.The model consisted of dielectric pillar photonic crystal set in air, The column is replaced by a ferrite column with the same dielectric constant. When a magnetic field is applied, the ferrite column produces a permeability that is not equal to one, which results in a waveguide mode in the photonic bandgap. When the field is removed, The system is restored to a perfect photonic crystal, and thus a magnetron photonic switch circuit can be formed. The square columns are arranged on the square lattice points. The calculation results prove that this assumption is feasible and some valuable results are given.