High-Performance Tapered Fiber Surface Plasmon Resonance Sensor Based on the Graphene/Ag/TiO2 Layer

被引：20

作者：

Wang, Dan ^{[1
,2
,3
]}

Li, Wei ^{[1
,2
,3
,4
,5
]}

Zhang, Qinrong ^{[1
,2
,3
]}

Liang, Benquan ^{[1
,2
,3
]}

Peng, Zhenkai ^{[1
,2
,3
]}

Xu, Jie ^{[1
,2
,3
]}

Zhu, Chen ^{[1
,2
,3
]}

Li, Jinze ^{[1
,2
,3
]}

机构：

[1] Nanjing Univ Posts & Telecommun, Coll Elect & Opt Engn, Nanjing 210023, Peoples R China

[2] Nanjing Univ Posts & Telecommun, Coll Microelect, Jiangsu Opt Commun Engn Technol Res Ctr, Nanjing 210023, Peoples R China

[3] Jiangsu Prov Engn Res Ctr Fabricat & Applicat Spe, Nanjing 210093, Peoples R China

[4] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510641, Peoples R China

[5] Southeast Univ, State Key Lab Bioelect, Nanjing 210096, Peoples R China

来源：

PLASMONICS | 2021年 / 16卷 / 06期

基金：

中国博士后科学基金;

关键词：

Surface plasmon resonance; Micro-fiber; Graphene/Ag/TiO2; Sensor; OPTICAL-FIBER; SPR SENSOR; WAVE-GUIDE; BIOSENSOR; SIMULATION; FILM;

D O I：

10.1007/s11468-021-01483-w

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, a highly sensitive surface plasmon resonance sensor is proposed on the basis of a miniature tapered single-mode fiber. The sensing area of the tapered fiber is coated with graphene, silver, and titanium dioxide layer. The graphene layer is used to increase the light absorption rate, and the titanium dioxide layer is used to protect the silver layer from oxidation and improve the sensor sensitivity due to its high dielectric constant. According to the simulation results of COMSOL Multiphysics software, when the graphene is 15 layers, the silver layer is 40 nm, and the titanium dioxide is 20 nm, high-performance SPR can be obtained. The refractive index detection range of this sensor is 1.32-1.38, and its sensitivity can reach 8750 nm/RIU when the external refractive index is 1.38. The research results have potential application value for the design of high-performance SPR sensors.

引用

页码：2291 / 2303

页数：13

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