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采用传输矩阵法通过数值计算模拟的方式,研究缺陷对一维光子晶体滤波性能的调制作用,结果表明:当含缺陷单元位于光子晶体周期性排列结构中间时,缺陷数目可改变光子晶体的滤波通道(缺陷模)数目和滤波品质,但不改变透射率;当含缺陷单元偏离光子晶体结构中心越远,光子晶体各滤波通道的透射率就越低,但滤波通道之间的距离保持不变;随着两个含缺陷的单元之间距离增大,光子晶体各滤波通道的滤波品质升高并出现简并趋势;当缺陷的厚度成倍数增大时,各滤波通道滤波品质升高并出现多系多通道滤波现象。缺陷对一维光子晶体滤波特性的影响规律,为光子晶体设计新型光学滤波器件及其调制机制提供理论参考。
The transfer matrix method was used to simulate the one-dimensional photonic crystal by numerical simulation. The results show that when the defect-containing unit is located in the middle of the periodically arranged photonic crystal, the number of defects can change the filtering channel of the photonic crystal (Defect mode) and filter quality, but does not change the transmissivity. The farther the defect unit deviates from the center of the photonic crystal structure, the lower the transmittance of each filter channel of the photonic crystal, but the distance between the filter channels remains the same; As the distance between the two defective elements increases, the filtering quality of each filter channel of photonic crystal increases and degenerates. When the defect thickness multiples, the filtering quality of each filter channel increases and more Department of multi-channel filtering phenomenon. Defects on the one-dimensional photonic crystal filter characteristics of the law for the design of photonic crystals of new optical filters and modulation mechanism provides a theoretical reference.