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利用平面波展开法以及快速傅里叶转换法(FFT)计算了液体背景由圆形介质柱构造的二维三角晶格光子晶体的禁带结构,得到了溶液填充的光子晶体在不同偏振模式下光子禁带结构与百分浓度的对应关系.结果表明,在液体背景材料中填充硅柱的介质柱结构中,溶液的浓度变化与晶体禁带宽度接近线性关系,而线性相关程度受百分浓度的影响,光子晶体带隙宽度随溶液质量百分比浓度的不同,其光子带隙(PBG)发生变化。光子晶体的带隙宽度是溶液质量百分比的不同而不同。
The bandgap structure of a two-dimensional triangular lattice photonic crystal made of a circular dielectric column with a liquid background was calculated by using the plane wave expansion method and the fast Fourier transform method (FFT). The photonic crystals filled with the solution in different polarization modes were obtained. The structure of the forbidden band and the percentage concentration were studied.The results show that the concentration of the solution in the column filled with silicon column in the liquid background material is nearly linear with the forbidden band width and the linear correlation is affected by the percentage concentration Influence, photonic crystal band gap width with the percentage of the mass concentration of the solution, its photonic bandgap (PBG) changes. The photonic crystal has a bandgap width that is different from the mass percentage of the solution.