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用传输矩阵方法研究了由两种单负材料构成的光子晶体异质结构多通道滤波器,结果表明,随着异质界面数的增加,零有效位相带隙内出现的共振模的个数增多,并且共振模的数目与异质界面数相等,为多通道滤波器的通道个数的调节提供了精确方法.当介质存在耗散时,我们得到:异质界面数越大,共振模衰减的幅度越大;耗散因子越大,共振模衰减的幅度越大.多通道滤波器的品质因子Q值与异质界面数成线性关系,随耗散系数的增大而减小,为多通道滤波器的品质因子的调节提供了一种可行的方法.
The propagation matrix method is used to study the multi-channel photonic crystal heterostructures composed of two kinds of single-negative materials. The results show that as the number of heterogeneous interfaces increases, the number of resonance modes in the zero-effective phase bandgap increases , And the number of resonant modes is equal to the number of heterogeneous interfaces, which provides an accurate method for adjusting the number of channels in a multi-channel filter. When the medium is dissipated, we obtain that the larger the number of heterogeneous interfaces, The larger the amplitude is, the larger the dissipation factor is and the larger the amplitude of the mode attenuation is. The Q factor of the multi-channel filter has a linear relationship with the number of heterogeneous interfaces, decreases with the increase of the dissipation factor, The adjustment of the quality factor of the filter provides a feasible method.