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Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering

Because of the unique selection rule, hyper-Raman scattering (HRS) can provide spectral information that linear Raman and infrared spectroscopy cannot obtain. However, the weak signal is the key bottleneck that restricts the application of HRS technique in study of the molecular structure, surface o...

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Autores principales: Zhu, Shuangmei, Fan, Chunzhen, Ding, Pei, Liang, Erjun, Hou, Hongwei, Wu, Yuanda
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6082913/
https://www.ncbi.nlm.nih.gov/pubmed/30089880
http://dx.doi.org/10.1038/s41598-018-30331-x
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author Zhu, Shuangmei
Fan, Chunzhen
Ding, Pei
Liang, Erjun
Hou, Hongwei
Wu, Yuanda
author_facet Zhu, Shuangmei
Fan, Chunzhen
Ding, Pei
Liang, Erjun
Hou, Hongwei
Wu, Yuanda
author_sort Zhu, Shuangmei
collection PubMed
description Because of the unique selection rule, hyper-Raman scattering (HRS) can provide spectral information that linear Raman and infrared spectroscopy cannot obtain. However, the weak signal is the key bottleneck that restricts the application of HRS technique in study of the molecular structure, surface or interface behavior. Here, we theoretically design and investigate a kind of plasmonic substrate consisting of Ag nanorices for enhancing the HRS signal based on the electromagnetic enhancement mechanism. The Ag nanorice can excite multiple resonances at optical and near-infrared frequencies. By properly designing the structure parameters of Ag nanorice, multi- plasmon resonances with large electromagnetic field enhancements can be excited, when the “hot spots” locate on the same spatial positions and the resonance wavelengths match with the pump and the second-order Stokes beams, respectively. Assisted by the field enhancements resulting from the first- and second-longitudinal plasmon resonance of Ag nanorice, the enhancement factor of surface enhanced hyper-Raman scattering can reach as high as 5.08 × 10(9), meaning 9 orders of magnitude enhancement over the conventional HRS without the plasmonic substrate.
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spelling pubmed-60829132018-08-13 Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering Zhu, Shuangmei Fan, Chunzhen Ding, Pei Liang, Erjun Hou, Hongwei Wu, Yuanda Sci Rep Article Because of the unique selection rule, hyper-Raman scattering (HRS) can provide spectral information that linear Raman and infrared spectroscopy cannot obtain. However, the weak signal is the key bottleneck that restricts the application of HRS technique in study of the molecular structure, surface or interface behavior. Here, we theoretically design and investigate a kind of plasmonic substrate consisting of Ag nanorices for enhancing the HRS signal based on the electromagnetic enhancement mechanism. The Ag nanorice can excite multiple resonances at optical and near-infrared frequencies. By properly designing the structure parameters of Ag nanorice, multi- plasmon resonances with large electromagnetic field enhancements can be excited, when the “hot spots” locate on the same spatial positions and the resonance wavelengths match with the pump and the second-order Stokes beams, respectively. Assisted by the field enhancements resulting from the first- and second-longitudinal plasmon resonance of Ag nanorice, the enhancement factor of surface enhanced hyper-Raman scattering can reach as high as 5.08 × 10(9), meaning 9 orders of magnitude enhancement over the conventional HRS without the plasmonic substrate. Nature Publishing Group UK 2018-08-08 /pmc/articles/PMC6082913/ /pubmed/30089880 http://dx.doi.org/10.1038/s41598-018-30331-x Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhu, Shuangmei
Fan, Chunzhen
Ding, Pei
Liang, Erjun
Hou, Hongwei
Wu, Yuanda
Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering
title Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering
title_full Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering
title_fullStr Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering
title_full_unstemmed Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering
title_short Theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-Raman scattering
title_sort theoretical investigation of a plasmonic substrate with multi-resonance for surface enhanced hyper-raman scattering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6082913/
https://www.ncbi.nlm.nih.gov/pubmed/30089880
http://dx.doi.org/10.1038/s41598-018-30331-x
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