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用传输矩阵法研究了在不同入射角时对称缺陷复合光子晶体[D(AB)mD]2结构s偏振和p偏振的光传输特性。计算结果表明:对称缺陷复合光子晶体[D(AB)mD]2结构中的禁带出现两个完全共振透射峰。随着入射角的增大,s光和p光的带隙中心和透射峰都向高频方向移动,s光的带宽增大,p光的带宽减小,但带隙中心始终相同。通过微小地改变入射角可改变透射峰的频率和偏振态。此结果为该结构实现双通道方位开关和偏振器提供了理论依据,也为拓宽该结构带隙和得到所需要的偏振光提供了理论基础。
The propagation properties of s-polarization and p-polarization of the [D (AB) mD] 2 complex photonic crystal with symmetric defects at different incident angles were studied by transmission matrix method. The calculated results show that two completely resonant transmission peaks appear in the forbidden band in the [D (AB) mD] 2 structure of the symmetric defect complex photonic crystal. As the incident angle increases, the bandgap center and the transmission peak of s-light and p-light move to the high frequency. The bandwidth of s-light increases and the bandwidth of p-light decreases, but the bandgap center is always the same. The frequency and polarization state of the transmission peak can be changed by slightly changing the angle of incidence. The results provide a theoretical basis for the realization of dual-channel azimuth switches and polarizers, and provide a theoretical basis for broadening the band gap of the structure and obtaining the required polarized light.