基于平面波展开法,设计缺陷态二维正方晶格光子晶体结构,改变构成缺陷态结构的材料、占空比,应用Matlab语言计算机仿真得到,高介电常数材料构成的缺陷态光子晶体形成较宽的横磁波光子带隙,占空比在30%时形成较宽的横磁波光子带隙。研究结论为缺陷态光子晶体滤波器件的制作提供理论依据。 Based on the plane wave expansion method, the defect-state two-dimensional square lattice photonic crystal structure is designed and the material and duty cycle of the defect state structure are changed. The computer simulation of Matlab language is used to obtain that the defect photonic crystal formed by the high dielectric constant material is wide Of the transverse magnetic photonic bandgap, the duty cycle at 30% to form a wider transverse magnetic photonic bandgap. The research conclusion provides a theoretical basis for fabrication of defect photonic crystal filter device.