为了得出光子晶体缺陷透射峰位置与溶液折射率及溶液浓度的关系, 从而得知溶液的折射率和溶度之间的关系。本文构造了(AB)NC(AB)N型的一维光子晶体模型, 采用时域有限差分法对该一维光子晶体的透射光谱做了数值模拟和分析。结果表明, 蔗糖溶液折射率和浓度与光子晶体透过峰位置之间为严格的线性关系, 光子晶体缺陷模透射峰位置随溶液浓度百分比的改变而变化。该溶液测量方法的溶液折射率测量灵敏度高达498.087 nm/RIU。 这为光子晶体溶液折射率及浓度测量传感器的设计制作提供了参考, 有助于该溶液浓度检测传感器在实际应用中的推广。

In order to obtain the relationship between the position of the transmission peak of the photonic crystal defect and the refractive index(concentration) of the solution, the model of (AB)NC(AB)N one-dimensional photonic crystal was constructed in this paper. The transmission spectra of the one-dimensional photonic crystal were numerically simulated and analyzed by the finite difference time domain method. The results show that there is a strict linear relationship between the refractive index and the concentration of sucrose solution and the peak position of photonic crystal. The position of the transmission peak changes with the percentage of solution concentration. The solution measurement method of solution refractive index measurement sensitivity up to 498.087 nm/RIU. This provides a reference for the design and manufacture of photonic crystal solution refractive index and concentration measurement sensor, which is helpful for the promotion of the solution concentration detection sensor in practical application.