一种基于THz-TDS技术,用于食品添加剂高灵敏度区分的超材料传感器
投稿时间:2021-05-21  修订日期:2021-06-23  点此下载全文
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作者单位邮编
马佳路 电子科学与工程学院 610054
唐靖超 电子科学与工程学院 
王凯程 电子科学与工程学院 
郭良浩 电子科学与工程学院 
王少萌 电子科学与工程学院 
宫玉彬 电子科学与工程学院 610054
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:提出了一种用于食品工业中常用添加剂高灵敏度区分的太赫兹超材料传感器。该传感器由带有双尖端的开口谐振环(SRR)阵列组成。通过关注传感器的频率偏移,可以有效的区分液体样品的浓度和种类。超材料传感器被制作在石英基板上,该石英基板对太赫兹波是透明的。使用太赫兹时域光谱仪测量了浓度为0.2,0.4,2和4mg/ml的液体样品。结果表明,所提出的超材料传感器能检测的最低样品浓度为0.2mg/ml。同时,相同浓度的不同液体样品也可以被清晰地区分。该研究为基于开口谐振环结构的太赫兹超材料传感器在食品安全领域的应用提供了新的参考。
中文关键词:超材料,太赫兹传感器,高灵敏度,时域光谱技术,食品安全
 
A THz-TDS based Metamaterial Sensor for Sensitive Distinguishment of Food Additives
Abstract:A sensitive terahertz (THz) metamaterial sensor for the distinguishment of common additives in the food industry is proposed. The metamaterial sensor consists of an array of split ring resonator (SRR) with double tip ends. By checking the resonate frequency shift of the sensor, the concentration and the type of the solution sample can be distinguished. The metamaterial sensor is fabricated on a quartz substrate, which is transparent for THz wave. The solutions with the concentration of 0.2, 0.4, 2 and 4mg/ml have been measured by using a terahertz time domain spectroscopy (THz-TDS). The results illustrate that the proposed metamaterial sensor can detect the concentration of the solution sample, as low as 0.2mg/ml. Meanwhile, different solutions with same concentration can also be clearly distinguished. Our study provides new insights for the application of terahertz metamaterial sensor based on SRR structure in the field of food safety.
keywords:Metamaterial  Terahertz,sensor  Highly Sensitive Distinguishment  TDS Technology  Food Safety
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