Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film
We propose a simple structure with a two-dimensional (2D) circular-hole grating engraved on a gold film for ultra-wide range plasmonic refractive index (RI) sensing. The electromagnetic field distributions and reflection spectra of the structure are obtained using the finite-difference time-domain a...
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2021-07-01
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doaj-8f4b025ab7bb40a7beb0f8356121474f2021-06-27T04:37:13ZengElsevierResults in Physics2211-37972021-07-0126104396Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold filmJianli Yu0Jiankai Zhu1Song Ye2Xiangxian Wang3School of Electronic Engineering, Chaohu University, Chaohu, Anhui 238000, China; Corresponding author.School of Science, Lanzhou University of Technology, Lanzhou 730050, ChinaSchool of Electronic Engineering, Chaohu University, Chaohu, Anhui 238000, ChinaSchool of Science, Lanzhou University of Technology, Lanzhou 730050, ChinaWe propose a simple structure with a two-dimensional (2D) circular-hole grating engraved on a gold film for ultra-wide range plasmonic refractive index (RI) sensing. The electromagnetic field distributions and reflection spectra of the structure are obtained using the finite-difference time-domain approach for resonance mode analysis and sensing capability characterization. The simulation results show that a high-quality surface plasmon resonance with a narrow spectral bandwidth and strong dip strength can be excited using a 2D grating after compensating for a suitable optical momentum. The structure exhibits a high sensitivity of 1131 nm/RIU and stable sensing performance over an ultra-wide RI range of 1.0–2.0. An improved figure of merit is used to more comprehensively characterize the structural sensing performance. This sensor has the potential to be widely used in the field of biochemistry because of its simple preparation, high sensitivity, and ultra-wide sensing range.http://www.sciencedirect.com/science/article/pii/S2211379721005180Plasmonic sensorReflectance spectraSensitivityFigure of merit |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jianli Yu Jiankai Zhu Song Ye Xiangxian Wang |
spellingShingle |
Jianli Yu Jiankai Zhu Song Ye Xiangxian Wang Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film Results in Physics Plasmonic sensor Reflectance spectra Sensitivity Figure of merit |
author_facet |
Jianli Yu Jiankai Zhu Song Ye Xiangxian Wang |
author_sort |
Jianli Yu |
title |
Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film |
title_short |
Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film |
title_full |
Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film |
title_fullStr |
Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film |
title_full_unstemmed |
Ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film |
title_sort |
ultra-wide sensing range plasmonic refractive index sensor based on a two-dimensional circular-hole grating engraved on a gold film |
publisher |
Elsevier |
series |
Results in Physics |
issn |
2211-3797 |
publishDate |
2021-07-01 |
description |
We propose a simple structure with a two-dimensional (2D) circular-hole grating engraved on a gold film for ultra-wide range plasmonic refractive index (RI) sensing. The electromagnetic field distributions and reflection spectra of the structure are obtained using the finite-difference time-domain approach for resonance mode analysis and sensing capability characterization. The simulation results show that a high-quality surface plasmon resonance with a narrow spectral bandwidth and strong dip strength can be excited using a 2D grating after compensating for a suitable optical momentum. The structure exhibits a high sensitivity of 1131 nm/RIU and stable sensing performance over an ultra-wide RI range of 1.0–2.0. An improved figure of merit is used to more comprehensively characterize the structural sensing performance. This sensor has the potential to be widely used in the field of biochemistry because of its simple preparation, high sensitivity, and ultra-wide sensing range. |
topic |
Plasmonic sensor Reflectance spectra Sensitivity Figure of merit |
url |
http://www.sciencedirect.com/science/article/pii/S2211379721005180 |
work_keys_str_mv |
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