掺杂缺陷层的异质双周期光子晶体的磁光效应

Magneto-optical effect of dual-periodical photonic crystal heterostructures doped by impure layer

通过在掺杂缺陷层的异质双周期光子晶体的表面添加一层具有Voigt效应的磁光半导体层,使该光子晶体结构的缺陷模透过率对外磁场产生响应。首先研究磁光半导体层的介电常数(折射率)随外磁场的变化规律,进而利用传输矩阵法研究该结构缺陷模的透射率随外磁场的变化规律。研究结果表明:在选取合适的材料参数和结构参数条件下,可实现缺陷模透射率与磁场的相关性,获得受磁场调控的缺陷模透射率,从而该结构可以应用于窄带滤波器的磁控开关。

By applying a magneto-optical semiconductor layer of which has the Voigt effect to the surface of a dual-periodical photonic crystal heterostructures doped by impure layer, the transmittance of the defect mode of this photonic crystal makes a response to the external magnetic field.The variation of dielectric constant （refractive index） of the magneto-optical semiconductor surface accompanied with the external magnetic field was studied firstly. And then, the variation of transmittance of the defect mode with a external magnetic field was explored via using transfer matrix method.The results show that under the conditions of selecting a appropriate structural parameters and material parameter, it can realize the correlation between the transmittance of defect mode and the magnetic field,and obtain the transmittance of defect mode controlled by an external magnetic field.Therefore, the photonic crystal with such structure can be applied to the magnetic switch of the narrowband filter.