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...

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Main Authors: Zhining Lin, Shujing Chen, Chengyou Lin
Format: Article
Language:English
Published: MDPI AG 2020-04-01
Series:Sensors
Subjects:
Online Access:https://www.mdpi.com/1424-8220/20/9/2445
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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
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