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Assessing the plasmonics of gold nano-triangles with higher order laser modes
Regular arrays of metallic nano-triangles – so called Fischer patterns – are fabricated by nano-sphere lithography. We studied such gold nano-triangle arrays on silicon or glass substrates. A series of different samples was investigated with a parabolic mirror based confocal microscope where the sam...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Beilstein-Institut
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3512117/ https://www.ncbi.nlm.nih.gov/pubmed/23213631 http://dx.doi.org/10.3762/bjnano.3.77 |
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author | Hennemann, Laura E Kolloch, Andreas Kern, Andreas Mihaljevic, Josip Boneberg, Johannes Leiderer, Paul Meixner, Alfred J Zhang, Dai |
author_facet | Hennemann, Laura E Kolloch, Andreas Kern, Andreas Mihaljevic, Josip Boneberg, Johannes Leiderer, Paul Meixner, Alfred J Zhang, Dai |
author_sort | Hennemann, Laura E |
collection | PubMed |
description | Regular arrays of metallic nano-triangles – so called Fischer patterns – are fabricated by nano-sphere lithography. We studied such gold nano-triangle arrays on silicon or glass substrates. A series of different samples was investigated with a parabolic mirror based confocal microscope where the sample is scanned through the laser focus. By employing higher order laser modes (azimuthally and radially polarised laser beams), we can excite the Fischer patterns using either a pure in-plane (x,y) electric field or a strongly z-directional (optical axis of the optical microscope) electric field. We collected and evaluated the emitted luminescence and thereby investigated the respectively excited plasmonic modes. These varied considerably: firstly with the light polarisation in the focus, secondly with the aspect ratio of the triangles and thirdly with the employed substrate. Moreover, we obtained strongly enhanced Raman spectra of an adenine (sub-)monolayer on gold Fischer patterns on glass. We thus showed that gold Fischer patterns are promising surface-enhanced Raman scattering (SERS) substrates. |
format | Online Article Text |
id | pubmed-3512117 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Beilstein-Institut |
record_format | MEDLINE/PubMed |
spelling | pubmed-35121172012-12-04 Assessing the plasmonics of gold nano-triangles with higher order laser modes Hennemann, Laura E Kolloch, Andreas Kern, Andreas Mihaljevic, Josip Boneberg, Johannes Leiderer, Paul Meixner, Alfred J Zhang, Dai Beilstein J Nanotechnol Full Research Paper Regular arrays of metallic nano-triangles – so called Fischer patterns – are fabricated by nano-sphere lithography. We studied such gold nano-triangle arrays on silicon or glass substrates. A series of different samples was investigated with a parabolic mirror based confocal microscope where the sample is scanned through the laser focus. By employing higher order laser modes (azimuthally and radially polarised laser beams), we can excite the Fischer patterns using either a pure in-plane (x,y) electric field or a strongly z-directional (optical axis of the optical microscope) electric field. We collected and evaluated the emitted luminescence and thereby investigated the respectively excited plasmonic modes. These varied considerably: firstly with the light polarisation in the focus, secondly with the aspect ratio of the triangles and thirdly with the employed substrate. Moreover, we obtained strongly enhanced Raman spectra of an adenine (sub-)monolayer on gold Fischer patterns on glass. We thus showed that gold Fischer patterns are promising surface-enhanced Raman scattering (SERS) substrates. Beilstein-Institut 2012-10-04 /pmc/articles/PMC3512117/ /pubmed/23213631 http://dx.doi.org/10.3762/bjnano.3.77 Text en Copyright © 2012, Hennemann 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 Hennemann, Laura E Kolloch, Andreas Kern, Andreas Mihaljevic, Josip Boneberg, Johannes Leiderer, Paul Meixner, Alfred J Zhang, Dai Assessing the plasmonics of gold nano-triangles with higher order laser modes |
title | Assessing the plasmonics of gold nano-triangles with higher order laser modes |
title_full | Assessing the plasmonics of gold nano-triangles with higher order laser modes |
title_fullStr | Assessing the plasmonics of gold nano-triangles with higher order laser modes |
title_full_unstemmed | Assessing the plasmonics of gold nano-triangles with higher order laser modes |
title_short | Assessing the plasmonics of gold nano-triangles with higher order laser modes |
title_sort | assessing the plasmonics of gold nano-triangles with higher order laser modes |
topic | Full Research Paper |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3512117/ https://www.ncbi.nlm.nih.gov/pubmed/23213631 http://dx.doi.org/10.3762/bjnano.3.77 |
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