一维光子晶体的双通道位置设计及调整

Design and Modification of Double Channel of One-Dimensional Photonic Crystal

通过对法布里珀罗滤光片性质的研究,以及对法布里珀罗滤光片中缺陷层厚度变化对通道数目、位置影响的分析,为双通道一维光子晶体的设计提出了一条新的思路。在法布里珀罗结构的基础上引入一维光子晶体的双对称结构,并通过改变双对称结构的三个缺陷层厚度来实现对禁带内两个通道系列位置的独立调整。设计过程中采用有效界面法对通道的位置进行初步的计算,并通过计算机理论模拟对膜层进行修正,使通道的位置满足设计要求。设计结果表明,通过调整两个厚度参量可以克服双通道一维光子晶体中的通道干涉现象,从而实现通道位置的独立调整。

A new way for designing one-dimensional photonic crystal, which has double-channel, is given by researching the characteristics of Fabry-Perot filter and analyzing the influence of thickness change of defect layers on the number and the position of the channels. A double-symmetrical structure consisted of one-dimensional photonic crystal is introduced based on the Fabry-Perot structure. The position of the two channel series in the photonic forbidden band is separately adjusted by changing the thickness of three defect layers in the double-symmetrical structure. The equivalent surface method is used in the elementary calculation and the computer simulation is used to further modify the thickness of the layer. With this design, the interference of different channels is avoided and the independent change of the channel position is realized in the double-symmetrical one-dimensional photonic crystal.