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Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures

Localized surface plasmon resonances (LSPRs) in metallic nanostructures have been studied intensely in the last decade. Fano interference is an important way to decrease the resonance linewidth and enhance the spectral detection resolution, but realizing a Fano lineshape with both a narrow linewidth...

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Detalles Bibliográficos
Autores principales: Huo, Yanyan, Jia, Tianqing, Zhang, Yi, Zhao, Hua, Zhang, Shian, Feng, Donghai, Sun, Zhenrong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3821301/
https://www.ncbi.nlm.nih.gov/pubmed/24064596
http://dx.doi.org/10.3390/s130911350
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author Huo, Yanyan
Jia, Tianqing
Zhang, Yi
Zhao, Hua
Zhang, Shian
Feng, Donghai
Sun, Zhenrong
author_facet Huo, Yanyan
Jia, Tianqing
Zhang, Yi
Zhao, Hua
Zhang, Shian
Feng, Donghai
Sun, Zhenrong
author_sort Huo, Yanyan
collection PubMed
description Localized surface plasmon resonances (LSPRs) in metallic nanostructures have been studied intensely in the last decade. Fano interference is an important way to decrease the resonance linewidth and enhance the spectral detection resolution, but realizing a Fano lineshape with both a narrow linewidth and high spectral contrast-ratio is still challenging. Here we propose a metallic nanostructure consisting of a concentric square ring-disk (CSRD) nanostructure and an outside nanorod. Fano linewidth and spectral contrast ratio can be actively manipulated by adjusting the gap between the nanorod and CSRD, and by adjusting the gap between the ring and disk in CSRD. When the gap size in CSRD is reduced to 5 nm, the quadrupolar Fano linewidth is of 0.025 eV, with a contrast ratio of 80%, and the figure of merit reaches 15.
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spelling pubmed-38213012013-11-09 Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures Huo, Yanyan Jia, Tianqing Zhang, Yi Zhao, Hua Zhang, Shian Feng, Donghai Sun, Zhenrong Sensors (Basel) Article Localized surface plasmon resonances (LSPRs) in metallic nanostructures have been studied intensely in the last decade. Fano interference is an important way to decrease the resonance linewidth and enhance the spectral detection resolution, but realizing a Fano lineshape with both a narrow linewidth and high spectral contrast-ratio is still challenging. Here we propose a metallic nanostructure consisting of a concentric square ring-disk (CSRD) nanostructure and an outside nanorod. Fano linewidth and spectral contrast ratio can be actively manipulated by adjusting the gap between the nanorod and CSRD, and by adjusting the gap between the ring and disk in CSRD. When the gap size in CSRD is reduced to 5 nm, the quadrupolar Fano linewidth is of 0.025 eV, with a contrast ratio of 80%, and the figure of merit reaches 15. MDPI 2013-08-26 /pmc/articles/PMC3821301/ /pubmed/24064596 http://dx.doi.org/10.3390/s130911350 Text en © 2013 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 license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Huo, Yanyan
Jia, Tianqing
Zhang, Yi
Zhao, Hua
Zhang, Shian
Feng, Donghai
Sun, Zhenrong
Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures
title Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures
title_full Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures
title_fullStr Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures
title_full_unstemmed Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures
title_short Narrow and Deep Fano Resonances in a Rod and Concentric Square Ring-Disk Nanostructures
title_sort narrow and deep fano resonances in a rod and concentric square ring-disk nanostructures
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3821301/
https://www.ncbi.nlm.nih.gov/pubmed/24064596
http://dx.doi.org/10.3390/s130911350
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