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利用传输矩阵法对二元复合缺陷光子晶体的光学特性进行了研究,重点讨论了光子晶体由二元复合缺陷结构过渡到复合光子晶体结构的过程及其光学特性的变化规律。研究表明,通过改变二元复合缺陷的结构和层数,可以控制禁带中缺陷模式的有无和调节其波长在禁带中的位置,并可使缺陷模恰好位于禁带中心波长处,由此可实现高性能的光学窄带滤波或光子晶体的禁带展宽。该研究结果可为二元复合缺陷光子晶体微腔的设计及其在滤波器、激光器等光学器件中的应用提供参考。
The transfer matrix method was used to study the optical properties of binary composite defect photonic crystals. The process of the transition from binary composite defect structure to composite photonic crystal structure and the variation of its optical properties were mainly discussed. The results show that by changing the structure and number of binary composite defects, we can control whether the defect mode is in the forbidden band and adjust the position of its wavelength in the forbidden band, and make the defect mode exactly at the center wavelength of the forbidden band. This enables high-performance optical narrow-band filtering or bandgap broadening of photonic crystals. The results of this study can provide reference for the design of binary complex defect photonic crystal microcavity and its application in optical devices such as filters and lasers.