Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study
In this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS<sub>2</sub>, WS<sub>2</sub> and WSe<sub>2</sub>) hybrid structure, and theoretically investigate its sensitivity improvement in the visible re...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-04-01
|
Series: | Sensors |
Subjects: | |
Online Access: | https://www.mdpi.com/1424-8220/20/9/2445 |
id |
doaj-3f2d3690f3fe48b6803f393d62014486 |
---|---|
record_format |
Article |
spelling |
doaj-3f2d3690f3fe48b6803f393d620144862020-11-25T03:25:47ZengMDPI AGSensors1424-82202020-04-01202445244510.3390/s20092445Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical StudyZhining Lin0Shujing Chen1Chengyou Lin2College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, ChinaBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, ChinaCollege of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, ChinaIn this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS<sub>2</sub>, WS<sub>2</sub> and WSe<sub>2</sub>) hybrid structure, and theoretically investigate its sensitivity improvement in the visible region. The thickness of metal (Au, Ag or Cu) and the layer number of each 2D material are optimized using genetic algorithms to obtain the highest sensitivity for a specific wavelength of incident light. Then, the sensitivities of proposed SPR sensors with different metal films at various wavelengths are compared. An Ag-based SPR sensor exhibits a higher sensitivity than an Au- or Cu-based one at most wavelengths in the visible region. In addition, the sensitivity of the proposed SPR sensor varies obviously with the wavelength of incident light, and shows a maximum value of 159, 194 or 155 °/RIU for Au, Ag or Cu, respectively. It is demonstrated that the sensitivity of the SPR sensor based on 2D materials’ hybrid structure can be further improved by optimizing the wavelength of incident light.https://www.mdpi.com/1424-8220/20/9/2445surface plasmon resonancesensortwo-dimensional materialhybrid structuregenetic algorithm |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhining Lin Shujing Chen Chengyou Lin |
spellingShingle |
Zhining Lin Shujing Chen Chengyou Lin Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study Sensors surface plasmon resonance sensor two-dimensional material hybrid structure genetic algorithm |
author_facet |
Zhining Lin Shujing Chen Chengyou Lin |
author_sort |
Zhining Lin |
title |
Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study |
title_short |
Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study |
title_full |
Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study |
title_fullStr |
Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study |
title_full_unstemmed |
Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study |
title_sort |
sensitivity improvement of a surface plasmon resonance sensor based on two-dimensional materials hybrid structure in visible region: a theoretical study |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2020-04-01 |
description |
In this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS<sub>2</sub>, WS<sub>2</sub> and WSe<sub>2</sub>) hybrid structure, and theoretically investigate its sensitivity improvement in the visible region. The thickness of metal (Au, Ag or Cu) and the layer number of each 2D material are optimized using genetic algorithms to obtain the highest sensitivity for a specific wavelength of incident light. Then, the sensitivities of proposed SPR sensors with different metal films at various wavelengths are compared. An Ag-based SPR sensor exhibits a higher sensitivity than an Au- or Cu-based one at most wavelengths in the visible region. In addition, the sensitivity of the proposed SPR sensor varies obviously with the wavelength of incident light, and shows a maximum value of 159, 194 or 155 °/RIU for Au, Ag or Cu, respectively. It is demonstrated that the sensitivity of the SPR sensor based on 2D materials’ hybrid structure can be further improved by optimizing the wavelength of incident light. |
topic |
surface plasmon resonance sensor two-dimensional material hybrid structure genetic algorithm |
url |
https://www.mdpi.com/1424-8220/20/9/2445 |
work_keys_str_mv |
AT zhininglin sensitivityimprovementofasurfaceplasmonresonancesensorbasedontwodimensionalmaterialshybridstructureinvisibleregionatheoreticalstudy AT shujingchen sensitivityimprovementofasurfaceplasmonresonancesensorbasedontwodimensionalmaterialshybridstructureinvisibleregionatheoreticalstudy AT chengyoulin sensitivityimprovementofasurfaceplasmonresonancesensorbasedontwodimensionalmaterialshybridstructureinvisibleregionatheoreticalstudy |
_version_ |
1724595782046187520 |