In this work, we demonstrate the sensing principle to simultaneously detect the salinity and temperature of seawater using a 1D-defective photonic crystal structure. We designed a one-dimensional defective mode photonic crystal based on the well-known transfer matrix method (TMM) for detecting the seawater salinity and temperature. Our proposed optical sensor is based on the following concept. Since the concentration of the salinity in the seawater changes the refractive index of the seawater, the sensitivity can be calculated by a peak wavelength shift happening in the output transmission spectrum for its variation of different concentration of samples. By adjusting the design parameters of our proposed structure such as the thickness of the defect layer, the temperature and the salinity, we investigated the corresponding optical properties response where the resulted transmittance peak can be turned over the considered range.

中文翻译：

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基于一维缺陷光子晶体材料的海水盐度和温度检测

在这项工作中，我们展示了使用一维缺陷光子晶体结构同时检测海水盐度和温度的传感原理。我们基于众所周知的转移矩阵法 (TMM) 设计了一种用于检测海水盐度和温度的一维缺陷模式光子晶体。我们提出的光学传感器基于以下概念。由于海水中盐分的浓度会改变海水的折射率，因此灵敏度可以通过输出透射光谱中发生的峰值波长偏移来计算，因为它在不同浓度的样品中的变化。通过调整我们提出的结构的设计参数，如缺陷层的厚度、温度和盐度，