Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm

A bulk refractive index sensor based on a straight long-range surface plasmon polariton (LRSPP) waveguide is theoretically designed. The waveguide sensor consists of an Au stripe that is embedded in ultraviolet sensitive polymer SU-8. The geometric parameters are optimized by finite difference eigen...

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Detalles Bibliográficos
Autores principales: Xu, Yan, Wang, Fei, Gao, Yang, Zhang, Daming, Sun, Xiaoqiang, Berini, Pierre
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7273216/
https://www.ncbi.nlm.nih.gov/pubmed/32354164
http://dx.doi.org/10.3390/s20092507
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author Xu, Yan
Wang, Fei
Gao, Yang
Zhang, Daming
Sun, Xiaoqiang
Berini, Pierre
author_facet Xu, Yan
Wang, Fei
Gao, Yang
Zhang, Daming
Sun, Xiaoqiang
Berini, Pierre
author_sort Xu, Yan
collection PubMed
description A bulk refractive index sensor based on a straight long-range surface plasmon polariton (LRSPP) waveguide is theoretically designed. The waveguide sensor consists of an Au stripe that is embedded in ultraviolet sensitive polymer SU-8. The geometric parameters are optimized by finite difference eigenmode method at the optical wavelength of 850 nm. The sensitivity of 196 dB/RIU/mm can be obtained with a 1.5 μm wide, 25 nm thick Au stripe waveguide. Straight LRSPP waveguides are fabricated by a double layer lift-off process. Its optical transmission is characterized to experimentally prove the feasibility of the proposed design. This sensor has potential for the realization of a portable, low-cost refractometer.
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spelling pubmed-72732162020-06-19 Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm Xu, Yan Wang, Fei Gao, Yang Zhang, Daming Sun, Xiaoqiang Berini, Pierre Sensors (Basel) Article A bulk refractive index sensor based on a straight long-range surface plasmon polariton (LRSPP) waveguide is theoretically designed. The waveguide sensor consists of an Au stripe that is embedded in ultraviolet sensitive polymer SU-8. The geometric parameters are optimized by finite difference eigenmode method at the optical wavelength of 850 nm. The sensitivity of 196 dB/RIU/mm can be obtained with a 1.5 μm wide, 25 nm thick Au stripe waveguide. Straight LRSPP waveguides are fabricated by a double layer lift-off process. Its optical transmission is characterized to experimentally prove the feasibility of the proposed design. This sensor has potential for the realization of a portable, low-cost refractometer. MDPI 2020-04-28 /pmc/articles/PMC7273216/ /pubmed/32354164 http://dx.doi.org/10.3390/s20092507 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xu, Yan
Wang, Fei
Gao, Yang
Zhang, Daming
Sun, Xiaoqiang
Berini, Pierre
Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm
title Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm
title_full Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm
title_fullStr Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm
title_full_unstemmed Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm
title_short Straight Long-Range Surface Plasmon Polariton Waveguide Sensor Operating at λ(0) = 850 nm
title_sort straight long-range surface plasmon polariton waveguide sensor operating at λ(0) = 850 nm
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7273216/
https://www.ncbi.nlm.nih.gov/pubmed/32354164
http://dx.doi.org/10.3390/s20092507
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