期刊
SENSORS
卷 21, 期 23, 页码 -出版社
MDPI
DOI: 10.3390/s21238151
关键词
THz sensors; metamaterials; graphene; sensing; THz imaging
A graphene-based THz metamaterial sensor with high sensitivity under various sample loadings was designed in this paper. The sensor's performance was analyzed based on its absorption characteristics, demonstrating that the sensor based on refractive index is suitable for THz sensing applications.
In this paper, a graphene-based THz metamaterial has been designed and characterized for use in sensing various refractive index profiles. The proposed single-band THz sensor was constructed using a graphene-metal hybridized periodic metamaterial wherein the unit cell had a footprint of 1.395 lambda(eff) x 1.395 lambda(eff) and resonated at 4.4754 THz. The realized peak absorption was 98.88% at 4.4754 THz. The sensitivity of the proposed metamaterial sensor was estimated using the absorption characteristics of the unit cell. The performance of the sensor was analyzed under two different categories, viz. the random dielectric loading and chemical analytes, based on the refractive index. The proposed THz sensor offered a peak sensitivity of 22.75 GHz/Refractive Index Unit (RIU) for the various sample loadings. In addition, the effect of the sample thickness on the sensor performance was analyzed and the results were presented. From the results, it can be inferred that the proposed metamaterial THz sensor that was based on a refractive index is suitable for THz sensing applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据