Photonic crystal is a dielectric structure arranged according to certain rules, and its excellent electromagnetic wave characteristics can be used to manufacture a lot of kinds of photonic crystal devices. In this paper, a defect is introduced into the photonic crystal, and the transfer matrix method is used to study the relationship between the liquid concentration and the peak value of the liquid transmission at the electromagnetic wave length when the defect is a mixture of ethanol and glycol. The results show that by observing and measuring the position of the peak transmittance of the mixed liquid, the substance content of the liquid mixture, that is, the concentration, can be inferred. The accuracy of this method is compared with the experimental results, which shows that this method has high accuracy. This method is simple and easy to operate. This result opens up a new direction for the application of photonic crystals.

中文翻译：

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一种利用光子晶体光谱位置信息检测溶液中物质含量的方法

光子晶体是一种按一定规律排列的介质结构，其优良的电磁波特性可用于制造多种光子晶体器件。本文在光子晶体中引入缺陷，利用转移矩阵法研究当缺陷为乙醇和乙二醇。结果表明，通过观察和测量混合液透光率峰值的位置，可以推断出混合液的物质含量，即浓度。将该方法的准确度与实验结果进行对比，表明该方法具有较高的准确度。这种方法简单易操作。这一结果为光子晶体的应用开辟了新的方向。