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运用光学传输矩阵理论,深入研究了由一种各向异性材料组成的一维光子晶体中TE模式和TM模式中缺陷态的频率分布与缺陷层宽度之间的关系。与布拉格带隙相比,这种新型的光子晶体可以通过改变偏振方向实现缺陷态密度的改变。得出将高折射率层与外界接触时态密度最低并最适合于滤波特性的结论。对制作偏振变化滤波器方面和缺陷宽度控制滤波频率方面有重要的指导意义和应用价值。
Based on the theory of optical transmission matrix, the relationship between the frequency distribution of defect states and the width of defect layer in TE mode and TM mode in one-dimensional photonic crystal composed of an anisotropic material is deeply investigated. Compared with the Bragg bandgap, this new type of photonic crystal can be achieved by changing the direction of polarization defect state density changes. The conclusion is drawn that when the high refractive index layer is in contact with the outside world, the density of states is the lowest and most suitable for the filtering characteristics. There is an important guiding significance and application value in the aspects of making the polarization changing filter and the defect width controlling filtering frequency.