Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing

In this study, a surface diffraction two-dimensional (2D) grating structure was placed on the topmost layer of distributed Bragg reflectors (DBRs) for biosensing. Bloch surface wave (BSW) resonance was realized by coupling a 2D subwavelength hole-array grating and could be excited at different locat...

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Autores principales: Ge, Daohan, Shi, Jianpei, Rezk, Ahmed, Ma, Chao, Zhang, Liqiang, Yang, Ping, Zhu, Shining
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2019
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6787138/
https://www.ncbi.nlm.nih.gov/pubmed/31599355
http://dx.doi.org/10.1186/s11671-019-3159-8
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author Ge, Daohan
Shi, Jianpei
Rezk, Ahmed
Ma, Chao
Zhang, Liqiang
Yang, Ping
Zhu, Shining
author_facet Ge, Daohan
Shi, Jianpei
Rezk, Ahmed
Ma, Chao
Zhang, Liqiang
Yang, Ping
Zhu, Shining
author_sort Ge, Daohan
collection PubMed
description In this study, a surface diffraction two-dimensional (2D) grating structure was placed on the topmost layer of distributed Bragg reflectors (DBRs) for biosensing. Bloch surface wave (BSW) resonance was realized by coupling a 2D subwavelength hole-array grating and could be excited at different locations: the surface of 2D-grating layer or the inter-face between the DBR and bio-solution. Material losses in the multilayer dielectric were measured to test the robustness of this scheme. Both the surface diffraction-grating BSW (DG-BSW) and the alternative guided grating-coupled BSW (GC-BSW) configuration showed markedly enhanced angular sensitivity compared to conventional prism-coupled schematics. Exciting these modes using a grating-coupling technique appears to yield different extreme sensitivity modes with a maximum of 1190°/RIU for DG-BSW and 2255°/RIU for GC-BSW. Refractive index sensors with a high figure of merit may be realized via such compact configurations.
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spelling pubmed-67871382019-10-24 Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing Ge, Daohan Shi, Jianpei Rezk, Ahmed Ma, Chao Zhang, Liqiang Yang, Ping Zhu, Shining Nanoscale Res Lett Nano Express In this study, a surface diffraction two-dimensional (2D) grating structure was placed on the topmost layer of distributed Bragg reflectors (DBRs) for biosensing. Bloch surface wave (BSW) resonance was realized by coupling a 2D subwavelength hole-array grating and could be excited at different locations: the surface of 2D-grating layer or the inter-face between the DBR and bio-solution. Material losses in the multilayer dielectric were measured to test the robustness of this scheme. Both the surface diffraction-grating BSW (DG-BSW) and the alternative guided grating-coupled BSW (GC-BSW) configuration showed markedly enhanced angular sensitivity compared to conventional prism-coupled schematics. Exciting these modes using a grating-coupling technique appears to yield different extreme sensitivity modes with a maximum of 1190°/RIU for DG-BSW and 2255°/RIU for GC-BSW. Refractive index sensors with a high figure of merit may be realized via such compact configurations. Springer US 2019-10-10 /pmc/articles/PMC6787138/ /pubmed/31599355 http://dx.doi.org/10.1186/s11671-019-3159-8 Text en © The Author(s). 2019 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Ge, Daohan
Shi, Jianpei
Rezk, Ahmed
Ma, Chao
Zhang, Liqiang
Yang, Ping
Zhu, Shining
Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing
title Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing
title_full Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing
title_fullStr Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing
title_full_unstemmed Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing
title_short Two-Dimensional Hole-Array Grating-Coupling-Based Excitation of Bloch Surface Waves for Highly Sensitive Biosensing
title_sort two-dimensional hole-array grating-coupling-based excitation of bloch surface waves for highly sensitive biosensing
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6787138/
https://www.ncbi.nlm.nih.gov/pubmed/31599355
http://dx.doi.org/10.1186/s11671-019-3159-8
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