Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure
The gap-plasmon resonance of a gold nanoparticle inside a nanopore in an aluminum film is investigated in polarization dependent single particle microscopy and spectroscopy. Scattering and transmission measurements reveal that gap-plasmons of this structure can be excited and observed under normal i...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2016-06-01
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| Series: | APL Photonics |
| Online Access: | http://dx.doi.org/10.1063/1.4945354 |
| _version_ | 1818977536314441728 |
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| author | Chatdanai Lumdee Pieter G. Kik |
| author_facet | Chatdanai Lumdee Pieter G. Kik |
| author_sort | Chatdanai Lumdee |
| collection | DOAJ |
| description | The gap-plasmon resonance of a gold nanoparticle inside a nanopore in an aluminum film is investigated in polarization dependent single particle microscopy and spectroscopy. Scattering and transmission measurements reveal that gap-plasmons of this structure can be excited and observed under normal incidence excitation and collection, in contrast to the more common particle-on-a-mirror structure. Correlation of numerical simulations with optical spectroscopy suggests that a local electric field enhancement factor in excess of 50 is achieved under normal incidence excitation, with a hot-spot located near the top surface of the structure. It is shown that the strong field enhancement from this sidewall gap-plasmon mode can be efficiently excited over a broad angular range. The presented plasmonic structure lends itself to implementation in low-cost, chemically stable, easily addressable biochemical sensor arrays providing large optical field enhancement factors. |
| first_indexed | 2024-12-20T16:29:18Z |
| format | Article |
| id | doaj.art-786405028a1d4b1ab11bc2de3cacd709 |
| institution | Directory Open Access Journal |
| issn | 2378-0967 |
| language | English |
| last_indexed | 2024-12-20T16:29:18Z |
| publishDate | 2016-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Photonics |
| spelling | doaj.art-786405028a1d4b1ab11bc2de3cacd7092022-12-21T19:33:17ZengAIP Publishing LLCAPL Photonics2378-09672016-06-0113031301031301-710.1063/1.4945354007601APPOmnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structureChatdanai Lumdee0Pieter G. Kik1CREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd., Orlando, Florida 32816, USACREOL, The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd., Orlando, Florida 32816, USAThe gap-plasmon resonance of a gold nanoparticle inside a nanopore in an aluminum film is investigated in polarization dependent single particle microscopy and spectroscopy. Scattering and transmission measurements reveal that gap-plasmons of this structure can be excited and observed under normal incidence excitation and collection, in contrast to the more common particle-on-a-mirror structure. Correlation of numerical simulations with optical spectroscopy suggests that a local electric field enhancement factor in excess of 50 is achieved under normal incidence excitation, with a hot-spot located near the top surface of the structure. It is shown that the strong field enhancement from this sidewall gap-plasmon mode can be efficiently excited over a broad angular range. The presented plasmonic structure lends itself to implementation in low-cost, chemically stable, easily addressable biochemical sensor arrays providing large optical field enhancement factors.http://dx.doi.org/10.1063/1.4945354 |
| spellingShingle | Chatdanai Lumdee Pieter G. Kik Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure APL Photonics |
| title | Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure |
| title_full | Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure |
| title_fullStr | Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure |
| title_full_unstemmed | Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure |
| title_short | Omnidirectional excitation of sidewall gap-plasmons in a hybrid gold-nanoparticle/aluminum-nanopore structure |
| title_sort | omnidirectional excitation of sidewall gap plasmons in a hybrid gold nanoparticle aluminum nanopore structure |
| url | http://dx.doi.org/10.1063/1.4945354 |
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