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
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电子科学与工程学院,电子科技大学,成都,中国,610054

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国家自然科学基金项目(面上项目,重点项目,重大项目)


A THz-TDS based Metamaterial Sensor for Sensitive Distinguishment of Food Additives
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School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

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Supported by the National Natural Science Foundation of China (61921002, 61988102)

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    摘要:

    论文提出了一种用于食品工业中常用添加剂(肌醇,亮氨酸,牛磺酸)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。液体样品的不同浓度和种类对应于传感器不同的频率偏移,可以被用于液体样品浓度和种类的区分和辨别。该超材料传感器使用微纳工艺制作在对太赫兹波透明的石英基板上。利用太赫兹时域光谱仪(THz-TDS)系统分别测量了浓度为0.2,0.4,1.5,2,3和4 mg/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0.2 mg/ml。同时,该传感器也可以实现相同浓度,不同种类液体样品的辨别。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。

    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 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, 1.5, 2, 3 and 4 mg/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 0.2 mg/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.

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历史
  • 收稿日期:2021-05-21
  • 最后修改日期:2022-03-06
  • 录用日期:2021-07-07
  • 在线发布日期: 2022-02-28
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