以面心立方密堆积结构的三维光子晶体为研究对象,利用等体积原则将其等效为一维光子晶体结构,采用传输矩阵法计算晶体微球粒径、晶体堆积厚度对光子晶体反射率、带隙位置及宽度的影响,并通过CIE标准色度系统得到色品坐标,在CIE色度图直观地反映光子晶体结构色变化.控制微球粒径尺度可以调节光子禁带,进而调控光子晶体结构色.微球粒径增大,光子带隙中心波长增大,对应的结构色波长也增大,对于粒径分别为200 nm、250 nm、300 nm、350 nm的二氧化硅胶体光子晶体,其对应结构色分别为蓝色、绿色、黄色、红色.晶体堆积厚度在一定范围内增大有利于反射率增大、带隙宽度变窄,从而影响颜色但不引起色相发生变化.
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