中国激光, 2019, 46 (6): 0614015, 网络出版: 2019-06-14
基于光栅结构太赫兹谐振器的醇水混合液检测 
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Detection of Alcohol-Water Mixture Based on Grating-Structured Terahertz Resonator
太赫兹技术 太赫兹光谱 表面等离激元 谐振器 介电常数 灵敏度 terahertz technology terahertz spectroscopy surface plasmon resonator dielectric constant sensitivity
摘要
利用基于柔性衬底的谐振器透射式太赫兹时域光谱(THz-TDS)系统,对不同体积分数的乙醇-水混合液进行检测。随着乙醇体积分数增加,谐振频率出现蓝移,第二谐振峰的偏移量大于第一谐振峰的偏移量,最大偏移量达到52 GHz,灵敏度约为100 GHz/RIU。由于谐振器的柔性和极低的样品消耗(约20 μL),这种方法使THz-TDS和太赫兹谐振器在生物领域的应用成为可能。
Abstract
A flexible metamaterial-based resonator was used to monitor the alcohol-water mixtures with different volume fractions using the terahertz time-domain spectroscopy (THz-TDS) in a transmission geometry. As the volume fraction of alcohol increases, the resonant frequencies of the biosensor blue-shift. The frequency shift of the second peak is higher than that of the first peak, the maximum shift value is 52 GHz, and the sensitivity is around 100 GHz/RIU. The developed resonator is flexible and has extremely low solution consumption (≈20 μL), indicating the proposed method shows possibility for the applicability of THz-TDS and the industrial application of THz resonators in the field of biology.
王鹏騛, 何明霞, 田震, 赵红卫. 基于光栅结构太赫兹谐振器的醇水混合液检测[J]. 中国激光, 2019, 46(6): 0614015. Pengfei Wang, Mingxia He, Zhen Tian, Hongwei Zhao. Detection of Alcohol-Water Mixture Based on Grating-Structured Terahertz Resonator[J]. Chinese Journal of Lasers, 2019, 46(6): 0614015.
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