Abstract

Sensitivity of sensors of aqueous solutions in which a terahertz signal is reflected from a structure consisting of a dielectric film and solution is studied. The maximum sensitivity is reached at angles of incidence and radiation frequencies that provide zero reflection of monochromatic radiation from the specified structure. Conditions for such reflection are determined for the s- and p-polarized radiation. The calculated results are proven by experimental data for a sensor of glucose in water in which a thin silicon film separates the solution from air. For the time-domain terahertz spectroscopy, the proposed sensor structure allows reliable detection and identification of glucose at concentrations of 10 and 30 g/L.

中文翻译：

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反射型太赫兹传感器的灵敏度

摘要

研究了从由介电膜和溶液组成的结构反射太赫兹信号的水溶液传感器的灵敏度。在入射角和辐射频率角处达到最大灵敏度，可以使指定结构的单色辐射零反射。对于s-和p-极化辐射，确定了这种反射的条件。通过水中葡萄糖传感器的实验数据证明了计算结果，其中薄的硅膜将溶液与空气分离。对于时域太赫兹光谱，提出的传感器结构允许以10和30 g / L的浓度可靠地检测和鉴定葡萄糖。