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建立了(AB)N型一维光子晶体结构多通道可调谐滤波器模型,其中A层是砷化镓(GaAs)材料,B层是由掺铝的氧化锌层和氧化锌层(AZO/ZnO)交替排列构成的具有人工周期结构的各项异性材料。根据电磁波的传输矩阵理论,推导了光子晶体的透射率公式。数值模拟表明:此结构光子晶体透射中心波长是1.55μm,对应于光子通带;透射峰的数量由光子晶体的周期N决定;B层中填充因子h从2/3增加到11/12,峰值波长蓝移且移动范围超过200 nm;A和B层厚度增加,透射峰中心波长发生红移;而入射角度的增加将使透射峰中心波长蓝移;在各参数的调控范围内,光子晶体均保持较高的透射率不变。这些现象为光通信波段多通道可调谐高性能滤波器的设计提供了理论参考。
A (AB) N-type one-dimensional photonic crystal multi-channel tunable filter model is established, in which layer A is GaAs material, layer B is composed of aluminum-doped zinc oxide layer and zinc oxide layer (AZO / ZnO ) Alternating arrangement of the composition of the artificial periodic structure of the anisotropic material. According to the transmission matrix theory of electromagnetic wave, the formula of transmittance of photonic crystal is deduced. The numerical simulation shows that the transmission center wavelength of this photonic crystal is 1.55μm, corresponding to the photon passband. The number of transmission peaks is determined by the period N of the photonic crystal. The filling factor h in layer B increases from 2/3 to 11/12, and the peak The blue shift of the wavelength and the moving range of more than 200 nm; A and B layer thickness increases, the central peak of the transmission peak redshift; and the increase of the incident angle will shift the center of the transmission peak wavelength blue; within the parameters of the regulation, the photonic crystals Maintain high transmittance unchanged. These phenomena provide a theoretical reference for the design of multi-channel tunable high-performance optical filters in the optical communications band.