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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2013
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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. |
format | Online Article Text |
id | pubmed-3821301 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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