Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror

For the attractive plasmonic structure consisting of metal nanoparticles (NPs) on a mirror, the coexistence of near-field NP-NP and NP-mirror couplings is numerically studied at normal incidence. By mapping their 3D surface charge distributions directly, we have demonstrated two different kinds of m...

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Autores principales: Huang, Yu, Ma, Lingwei, Hou, Mengjing, Li, Jianghao, Xie, Zheng, Zhang, Zhengjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4945943/
https://www.ncbi.nlm.nih.gov/pubmed/27418039
http://dx.doi.org/10.1038/srep30011
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author Huang, Yu
Ma, Lingwei
Hou, Mengjing
Li, Jianghao
Xie, Zheng
Zhang, Zhengjun
author_facet Huang, Yu
Ma, Lingwei
Hou, Mengjing
Li, Jianghao
Xie, Zheng
Zhang, Zhengjun
author_sort Huang, Yu
collection PubMed
description For the attractive plasmonic structure consisting of metal nanoparticles (NPs) on a mirror, the coexistence of near-field NP-NP and NP-mirror couplings is numerically studied at normal incidence. By mapping their 3D surface charge distributions directly, we have demonstrated two different kinds of mirror-induced bonding dipole plasmon modes and confirmed the bonding hybridizations of the mirror and the NP-dimer which may offer a much stronger near-field enhancement than that of the isolated NP dimers over a broad wavelength range. Further, it is revealed that the huge near-field enhancement of these two modes exhibit different dependence on the NP-NP and NP-mirror hot spots, while both of their near-field resonance wavelengths can be tuned to the blue exponentially by increasing the NP-NP gaps or the NP-mirror separation. Our results here benifit significantly the fundamental understanding and practical applications of metallic NPs on a mirror in plasmonics.
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spelling pubmed-49459432016-07-26 Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror Huang, Yu Ma, Lingwei Hou, Mengjing Li, Jianghao Xie, Zheng Zhang, Zhengjun Sci Rep Article For the attractive plasmonic structure consisting of metal nanoparticles (NPs) on a mirror, the coexistence of near-field NP-NP and NP-mirror couplings is numerically studied at normal incidence. By mapping their 3D surface charge distributions directly, we have demonstrated two different kinds of mirror-induced bonding dipole plasmon modes and confirmed the bonding hybridizations of the mirror and the NP-dimer which may offer a much stronger near-field enhancement than that of the isolated NP dimers over a broad wavelength range. Further, it is revealed that the huge near-field enhancement of these two modes exhibit different dependence on the NP-NP and NP-mirror hot spots, while both of their near-field resonance wavelengths can be tuned to the blue exponentially by increasing the NP-NP gaps or the NP-mirror separation. Our results here benifit significantly the fundamental understanding and practical applications of metallic NPs on a mirror in plasmonics. Nature Publishing Group 2016-07-15 /pmc/articles/PMC4945943/ /pubmed/27418039 http://dx.doi.org/10.1038/srep30011 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Huang, Yu
Ma, Lingwei
Hou, Mengjing
Li, Jianghao
Xie, Zheng
Zhang, Zhengjun
Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
title Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
title_full Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
title_fullStr Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
title_full_unstemmed Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
title_short Hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
title_sort hybridized plasmon modes and near-field enhancement of metallic nanoparticle-dimer on a mirror
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4945943/
https://www.ncbi.nlm.nih.gov/pubmed/27418039
http://dx.doi.org/10.1038/srep30011
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