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研究了二维光子晶体结构的带隙宽度随溶液浓度变化的关系,选择二维三角晶格光子晶体(Si和Ge)作为基底,在空气孔内填充待测质量摩尔浓度不同的混合二元溶液材料,得到了二元溶液填充的光子晶体在不同偏振模式下光子禁带结构。结果表明,溶液的质量摩尔浓度变化与晶体禁带宽度接近线性关系,而线性相关程度受背景介质柱材料的影响。不同背景基底晶格的光子晶体带隙宽度随溶液质量摩尔浓度的不同,其光子带隙(PBG)发生变化。这在溶液质量摩尔浓度检测应用方面有一定的指导作用。
The relationship between the bandgap width of two-dimensional photonic crystal structure and the solution concentration was studied. Two-dimensional triangular lattice photonic crystal (Si and Ge) was selected as the substrate, and the mixed binary solution with different molar concentrations The photonic bandgap structure of the binary solution-filled photonic crystal under different polarization modes was obtained. The results show that the change of mass molar concentration of the solution is nearly linear with the forbidden band width, and the linear correlation degree is affected by the background dielectric column material. The photonic band gap (PBG) of photonic crystals varies with the molar mass concentration of solution in different background substrates. This has some guidance in the application of solution quality molarity detection.