论文标题
Terahertz对超材料中多种共振的高吸收性水甲醇混合物的高度吸收性水传感
Terahertz sensing of highly absorptive water-methanol mixtures with multiple resonances in metamaterials
论文作者
论文摘要
高度吸收性水溶液的超敏感性Terahertz感测，由于Terahertz制度中的水吸收强大，因此仍然具有挑战性。在这里，我们在实验上展示了一种具有成本效益的基于超材料的传感器，该传感器与Terahertz时域光谱范围集成，用于高吸收性水甲醇混合物感应。该超材料具有简单的不对称线结构，可支持多种共振，包括基本的FANO共振和Terahertz制度中的高阶偶极共振。两种共振模式在透射光谱中都具有很强的强度，我们利用该模式来检测高吸收性水甲醇混合物。发现对水甲醇混合物的Fano和偶极共振的实验表征的敏感性分别为160和305 GHz/riU。该方法为随时可用的超材料辅助Terahertz光谱法提供了一条途径，以对高吸收性化学和生化材料具有多种共振和高精度的超敏感感。
Ultrasensitive terahertz sensing of highly absorptive aqueous solutions remains challenging due to strong absorption of water in the terahertz regime. Here, we experimentally demonstrate a cost-effective metamaterial-based sensor integrated with terahertz time-domain spectroscopy for highly absorptive water-methanol mixture sensing. This metamaterial has simple asymmetric wire structures that support multiple resonances including a fundamental Fano resonance and higher order dipolar resonance in the terahertz regime. Both the resonance modes have strong intensity in the transmission spectra which we exploit for detection of the highly absorptive water-methanol mixtures. The experimentally characterized sensitivities of the Fano and dipole resonances for the water-methanol mixtures are found to be 160 and 305 GHz/RIU, respectively. This method provides a route for readily available metamaterial-assisted terahertz spectroscopy for ultrasensitive sensing of highly absorptive chemical and biochemical materials with multiple resonances and high accuracy.
