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Mapping of plasmonic resonances in nanotriangles

Plasmonic resonances in metallic nano-triangles have been investigated by irradiating these structures with short laser pulses and imaging the resulting ablation and melting patterns. The triangular gold structures were prepared on Si substrates and had a thickness of 40 nm and a side length of ca....

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Autores principales: Dickreuter, Simon, Gleixner, Julia, Kolloch, Andreas, Boneberg, Johannes, Scheer, Elke, Leiderer, Paul
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3817793/
https://www.ncbi.nlm.nih.gov/pubmed/24205453
http://dx.doi.org/10.3762/bjnano.4.66
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author Dickreuter, Simon
Gleixner, Julia
Kolloch, Andreas
Boneberg, Johannes
Scheer, Elke
Leiderer, Paul
author_facet Dickreuter, Simon
Gleixner, Julia
Kolloch, Andreas
Boneberg, Johannes
Scheer, Elke
Leiderer, Paul
author_sort Dickreuter, Simon
collection PubMed
description Plasmonic resonances in metallic nano-triangles have been investigated by irradiating these structures with short laser pulses and imaging the resulting ablation and melting patterns. The triangular gold structures were prepared on Si substrates and had a thickness of 40 nm and a side length of ca. 500 nm. Irradiation was carried out with single femtosecond and picosecond laser pulses at a wavelength of 800 nm, which excited higher order plasmon modes in these triangles. The ablation distribution as well as the local melting of small parts of the nanostructures reflect the regions of large near-field enhancement. The observed patterns are reproduced in great detail by FDTD simulations with a 3-dimensional model, provided that the calculations are not based on idealized, but on realistic structures. In this realistic model, details like the exact shape of the triangle edges and the dielectric environment of the structures are taken into account. The experimental numbers found for the field enhancement are typically somewhat smaller than the calculated ones. The results demonstrate the caveats for FDTD simulations and the potential and the limitations of “near field photography” by local ablation and melting for the mapping of complex plasmon fields and their applications.
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spelling pubmed-38177932013-11-07 Mapping of plasmonic resonances in nanotriangles Dickreuter, Simon Gleixner, Julia Kolloch, Andreas Boneberg, Johannes Scheer, Elke Leiderer, Paul Beilstein J Nanotechnol Full Research Paper Plasmonic resonances in metallic nano-triangles have been investigated by irradiating these structures with short laser pulses and imaging the resulting ablation and melting patterns. The triangular gold structures were prepared on Si substrates and had a thickness of 40 nm and a side length of ca. 500 nm. Irradiation was carried out with single femtosecond and picosecond laser pulses at a wavelength of 800 nm, which excited higher order plasmon modes in these triangles. The ablation distribution as well as the local melting of small parts of the nanostructures reflect the regions of large near-field enhancement. The observed patterns are reproduced in great detail by FDTD simulations with a 3-dimensional model, provided that the calculations are not based on idealized, but on realistic structures. In this realistic model, details like the exact shape of the triangle edges and the dielectric environment of the structures are taken into account. The experimental numbers found for the field enhancement are typically somewhat smaller than the calculated ones. The results demonstrate the caveats for FDTD simulations and the potential and the limitations of “near field photography” by local ablation and melting for the mapping of complex plasmon fields and their applications. Beilstein-Institut 2013-09-30 /pmc/articles/PMC3817793/ /pubmed/24205453 http://dx.doi.org/10.3762/bjnano.4.66 Text en Copyright © 2013, Dickreuter et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Dickreuter, Simon
Gleixner, Julia
Kolloch, Andreas
Boneberg, Johannes
Scheer, Elke
Leiderer, Paul
Mapping of plasmonic resonances in nanotriangles
title Mapping of plasmonic resonances in nanotriangles
title_full Mapping of plasmonic resonances in nanotriangles
title_fullStr Mapping of plasmonic resonances in nanotriangles
title_full_unstemmed Mapping of plasmonic resonances in nanotriangles
title_short Mapping of plasmonic resonances in nanotriangles
title_sort mapping of plasmonic resonances in nanotriangles
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3817793/
https://www.ncbi.nlm.nih.gov/pubmed/24205453
http://dx.doi.org/10.3762/bjnano.4.66
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