Terahertz imaging sensor based on the strong coupling of surface plasmon polaritons between PVDF and graphene

被引：23

作者：

Zhu, Jiaqi ^{[1
]}

Ruan, Banxian ^{[1
]}

You, Qi ^{[1
]}

Guo, Jun ^{[1
]}

Dai, Xiaoyu ^{[1
]}

Xiang, Yuanjiang ^{[1
]}

机构：

[1] Shenzhen Univ, SZU NUS Collaborat Innovat Ctr Optoelect Sci & Te, Key Lab Optoelect Devices & Syst, Minist Educ & Guangdong Prov,Coll Optoelect Engn, Shenzhen 518060, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2018年 / 264卷

基金：

中国国家自然科学基金;

关键词：

Surface plasmon polaritons; Graphene; Strong coupling; SENSITIVITY ENHANCEMENT; RESONANCE; HETEROSTRUCTURE; OPTICS; LAYER;

D O I：

10.1016/j.snb.2018.02.181

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Surface plasmon polaritons (SPPs) of metal materials such as gold and silver are excited in the visible and near-infrared band, while the graphene SPPs exist from mid-infrared to terahertz (THz) ranges. Hence it is difficult to realize the coupling of SPPs of metals and graphene. In this paper, we realize coupling of two SPPs modes based on graphene and polyvinylidene fluoride (PVDF) in THz range, which is vital for the research of new sensors in terahertz spectrum. Based on the dispersion relation, it is demonstrated that the two different THz SPP modes in the hybrid configuration can be coupled together. We apply our design to the imaging sensor, and the highest imaging sensitivity as high as 730RIU(-1) is realized in the proposed sensors (which can be used in gas detection). Our results suggest that the strong coupling of two SPPs modes is an efficient method to achieve high sensing properties for the devices. (c) 2018 Elsevier B.V. All rights reserved.

引用

页码：398 / 403

页数：6

共 31 条

[1] Surface plasmon subwavelength optics [J].