The microwave optical properties of a photonic crystal-based tunable single and multichannel filter are theoretically investigated using the transfer matrix method, finite difference time domain method, and the plane wave expansion method. By applying an external voltage of 8 V/micron about a 35% frequency tuning is obtained. It is found that the number of transmission peaks is directly proportional to the number of periods (N). In addition to this, the dependence of layer thicknesses, angle of incidence and polarization are also analyzed, and it is noticed that the filtering frequency is invariant in angle and polarization. (C) 2015 Optical Society of America
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机译：理论上，使用转移矩阵法，时域有限差分法和平面波扩展法研究了基于光子晶体的可调谐单通道和多通道滤波器的微波光学特性。通过施加8 V /微米的外部电压，可获得大约35％的频率调谐。发现传输峰值的数目与周期数（N）成正比。除此之外，还分析了层厚度，入射角和偏振的依赖性，并且注意到滤波频率在角度和偏振方面是不变的。 （C）2015年美国眼镜学会
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