从光子晶体的光子频率禁带特性出发,提出了用两个或两个以上的各向异性周期结构光子晶体叠加在一起,形成叠层结构光子晶体,以获得窄带滤波特性的设想;利用光学传输矩阵法研究了这种结构的光子晶体,分析了在不同入射角和折射率条件下,该周期结构的透射和偏振的光学特性.分析表明,各向异性光子晶体在折射率比值较大或与高折射率各向同性介质结合使用,可以获得较窄的通带,从而实现滤波.数值模拟的结果也证实了上述构思的正确性.
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