Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering

Mapping near-field profiles and dynamics of surface plasmon polaritons is crucial for understanding their fundamental optical properties and designing miniaturized photonic devices. This requires a spatial resolution on the sub-wavelength scale because the effective polariton wavelength is shorter t...

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Main Authors: Du, Luping, Lei, Dang Yuan, Yuan, Guanghui, Fang, Hui, Zhang, Xi, Wang, Qian, Tang, Dingyuan, Min, Changjun, Maier, Stefan A., Yuan, Xiaocong
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/101424
http://hdl.handle.net/10220/18406
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1014242022-02-16T16:30:17Z Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering Du, Luping Lei, Dang Yuan Yuan, Guanghui Fang, Hui Zhang, Xi Wang, Qian Tang, Dingyuan Min, Changjun Maier, Stefan A. Yuan, Xiaocong School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering Mapping near-field profiles and dynamics of surface plasmon polaritons is crucial for understanding their fundamental optical properties and designing miniaturized photonic devices. This requires a spatial resolution on the sub-wavelength scale because the effective polariton wavelength is shorter than free-space excitation wavelengths. Here by combining total internal reflection excitation with surface-enhanced Raman scattering imaging, we mapped at the sub-wavelength scale the spatial distribution of the dominant perpendicular component of surface plasmon fields in a metal nanoparticle-film system through spectrally selective and polarization-resolved excitation of the vertical gap mode. The lateral field-extension at the junction, which is determined by the gap-mode volume, is small enough to distinguish a spot size ~0.355λ0 generated by a focused radially polarized beam with high reproducibility. The same excitation and imaging schemes are also used to trace near-field nano-focusing and interferences of surface plasmon polaritons created by a variety of plasmon lenses. Published version 2014-01-07T02:07:17Z 2019-12-06T20:38:33Z 2014-01-07T02:07:17Z 2019-12-06T20:38:33Z 2013 2013 Journal Article Du, L., Lei, D. Y., Yuan, G., Fang, H., Zhang, X., Wang, Q., et al. (2013). Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering. Scientific reports, 3, 1-6. 2045-2322 https://hdl.handle.net/10356/101424 http://hdl.handle.net/10220/18406 10.1038/srep03064 24165970 en Scientific reports © 2013 The Authors. This paper was published in Scientific Reports and is made available as an electronic reprint (preprint) with permission of the authors. The paper can be found at the following official DOI: [http://dx.doi.org/10.1038/srep03064]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Du, Luping
Lei, Dang Yuan
Yuan, Guanghui
Fang, Hui
Zhang, Xi
Wang, Qian
Tang, Dingyuan
Min, Changjun
Maier, Stefan A.
Yuan, Xiaocong
Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering
description Mapping near-field profiles and dynamics of surface plasmon polaritons is crucial for understanding their fundamental optical properties and designing miniaturized photonic devices. This requires a spatial resolution on the sub-wavelength scale because the effective polariton wavelength is shorter than free-space excitation wavelengths. Here by combining total internal reflection excitation with surface-enhanced Raman scattering imaging, we mapped at the sub-wavelength scale the spatial distribution of the dominant perpendicular component of surface plasmon fields in a metal nanoparticle-film system through spectrally selective and polarization-resolved excitation of the vertical gap mode. The lateral field-extension at the junction, which is determined by the gap-mode volume, is small enough to distinguish a spot size ~0.355λ0 generated by a focused radially polarized beam with high reproducibility. The same excitation and imaging schemes are also used to trace near-field nano-focusing and interferences of surface plasmon polaritons created by a variety of plasmon lenses.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Du, Luping
Lei, Dang Yuan
Yuan, Guanghui
Fang, Hui
Zhang, Xi
Wang, Qian
Tang, Dingyuan
Min, Changjun
Maier, Stefan A.
Yuan, Xiaocong
format Article
author Du, Luping
Lei, Dang Yuan
Yuan, Guanghui
Fang, Hui
Zhang, Xi
Wang, Qian
Tang, Dingyuan
Min, Changjun
Maier, Stefan A.
Yuan, Xiaocong
author_sort Du, Luping
title Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering
title_short Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering
title_full Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering
title_fullStr Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering
title_full_unstemmed Mapping plasmonic near-field profiles and interferences by surface-enhanced Raman scattering
title_sort mapping plasmonic near-field profiles and interferences by surface-enhanced raman scattering
publishDate 2014
url https://hdl.handle.net/10356/101424
http://hdl.handle.net/10220/18406
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