High-sensitive dual-band sensor based on microsize circular ring complementary terahertz metamaterial
High-sensitive dual-band sensor based on microsize circular ring complementary terahertz metamaterial
复制标题
基于微米圆环互补太赫兹超材料的高灵敏度双波段传感器
DOI：
10.1080/09205071.2016.1270232
复制
发表时间：
2017-01-01
影响因子：
1.3
通讯作者：
Jiang, Jiuxing
中科院分区：
文献类型：
--
作者：
He, Xunjun;Li, Shaopeng;Jiang, Jiuxing
摘要近年来，基于太赫兹超材料的共振传感受到了人们的广泛关注，这是因为谐振结构微间隙中的局域场得到了增强和限制。本文提出了一种基于微尺寸环形间隙阵列构成的互补型太赫兹超材料的高灵敏度双波段传感器来检测薄膜的厚度和折射率。该传感器的结构是偏振不敏感的双波段工作模式，可以很容易地被生物分子填充。模拟结果表明，双频谐振对介质变化非常敏感，得到了f1模的99 GHz/折射率单位(RIU)和f2模的242 GHz/RIU的灵敏度水平，并通过优化结构进一步提高了灵敏度水平。因此，这种结构在薄膜厚度监测方面有很好的应用前景。
Abstract Recently, resonance sensing based on the terahertz metamaterials has attracted considerable attentions due to the enhancement and confinement of local fields in microsize gap of resonant structures. Here, a high-sensitive dual-band sensor based on the complementary terahertz metamaterial composed of microsize circular ring gap array is proposed to detect the thickness and refractive index of thin film. The structure of this sensor is polarization insensitive dual-band operating mode and can be easily filled by the biomolecules. Simulation results demonstrate that the dual-band resonances are very sensitive to the dielectric variation, and the sensitivity levels of 99 GHz/refractive index unit (RIU) for mode f1 and 242 GHz/RIU for mode f2 are obtained and further enhanced by optimizing structures. Therefore, this structure can exhibit promising application for monitoring thin film thickness.