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A terahertz metamaterial sensor used for distinguishing glucose concentration

文献类型： 外文期刊

作者： Yang, Jun 1 ; Qi, Limei 1 ; Li, Bin 3 ; Wu, Liqin 4 ; Shi, Dan 1 ; Uqaili, Junaid Ahmed 1 ; Tao, Xiang 1 ;

作者机构： 1.Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China

2.Shandong Normal Univ, Collaborat Innovat Ctr Light Manipulat & Applicat, Jinan 250358, Peoples R China

3.Beijing Res Ctr Intelligent Equipment Agr, Beijing 100097, Peoples R China

4.Beijing Radiat Ctr, Beijing 100875, Peoples R China

关键词： Metamaterial; Glucose concentration; Terahertz; Sensor

期刊名称：RESULTS IN PHYSICS （ 影响因子：4.476； 五年影响因子：4.493 ）

ISSN： 2211-3797

年卷期： 2021 年 26 卷

页码：

收录情况： SCI

摘要： The real-time and label-free terahertz (THz) metamaterial (MM) sensor is proposed to distinguish the normal concentration of glucose from the abnormal concentration based on the THz time-domain spectroscopy (TDS) technology. The physical mechanism of the biosensing performance is verified theoretically and experimentally. The designed sensor is composed of a couple of asymmetric thick metals on a silicon dioxide substrate and exhibits two transmission dips at 0.26 THz and 0.4 THz in the region from 0.1 THz to 0.5 THz, respectively. Four glucose samples with concentrations from 4 mmol/L to 10 mmol/L with the step of 2 mmol/L are loaded on the top side of the sensor, respectively. The measured results show that the two dips have a red-shift as the concentration of glucose increases. The proposed sensor achieves the sensitivity of 1.22 THz/(mol/L) and 0.52 THz/(mol/L) and the limit of measurement reaches 9 mg/dL. The proposed THz MM sensor has potential applications in diagnosing hyperglycemia and the related diseases.

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