Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices
Nanohole arrays in metal films allow extraordinary optical transmission (EOT); the phenomenon is highly advantageous for biosensing applications. In this article, we theoretically investigate the performance of refractive index sensors, utilizing square and hexagonal arrays of nanoholes, that can mo...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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Springer US
2016
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| Online Access: | http://hdl.handle.net/1721.1/104652 https://orcid.org/0000-0002-3978-8478 |
| _version_ | 1811097769713074176 |
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| author | Ekşioğlu, Yasa Petráček, Jiří Cetin, Arif Engin |
| author2 | Massachusetts Institute of Technology. Department of Biological Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Biological Engineering Ekşioğlu, Yasa Petráček, Jiří Cetin, Arif Engin |
| author_sort | Ekşioğlu, Yasa |
| collection | MIT |
| description | Nanohole arrays in metal films allow extraordinary optical transmission (EOT); the phenomenon is highly advantageous for biosensing applications. In this article, we theoretically investigate the performance of refractive index sensors, utilizing square and hexagonal arrays of nanoholes, that can monitor the spectral position of EOT signals. We present near- and far-field characteristics of the aperture arrays and investigate the influence of geometrical device parameters in detail. We numerically compare the refractive index sensitivities of the two lattice geometries and show that the hexagonal array supports larger figure-of-merit values due to its sharper EOT response. Furthermore, the presence of a thin dielectric film that covers the gold surface and mimics a biomolecular layer causes larger spectral shifts within the EOT resonance for the hexagonal array. We also investigate the dependence of the transmission responses on hole radius and demonstrate that hexagonal lattice is highly promising for applications demanding strong light transmission. |
| first_indexed | 2024-09-23T17:04:39Z |
| format | Article |
| id | mit-1721.1/104652 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T17:04:39Z |
| publishDate | 2016 |
| publisher | Springer US |
| record_format | dspace |
| spelling | mit-1721.1/1046522022-10-03T10:14:59Z Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices Ekşioğlu, Yasa Petráček, Jiří Cetin, Arif Engin Massachusetts Institute of Technology. Department of Biological Engineering Koch Institute for Integrative Cancer Research at MIT Cetin, Arif Engin Nanohole arrays in metal films allow extraordinary optical transmission (EOT); the phenomenon is highly advantageous for biosensing applications. In this article, we theoretically investigate the performance of refractive index sensors, utilizing square and hexagonal arrays of nanoholes, that can monitor the spectral position of EOT signals. We present near- and far-field characteristics of the aperture arrays and investigate the influence of geometrical device parameters in detail. We numerically compare the refractive index sensitivities of the two lattice geometries and show that the hexagonal array supports larger figure-of-merit values due to its sharper EOT response. Furthermore, the presence of a thin dielectric film that covers the gold surface and mimics a biomolecular layer causes larger spectral shifts within the EOT resonance for the hexagonal array. We also investigate the dependence of the transmission responses on hole radius and demonstrate that hexagonal lattice is highly promising for applications demanding strong light transmission. Brno University of Technology (Project CZ.1.07/2.3.00/30.0039) 2016-10-06T18:26:16Z 2016-10-06T18:26:16Z 2015-10 2015-05 2016-08-18T15:45:19Z Article http://purl.org/eprint/type/JournalArticle 1557-1955 1557-1963 http://hdl.handle.net/1721.1/104652 Ekşioğlu, Yasa, Arif E. Cetin, and Jiří Petráček. “Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices.” Plasmonics 11.3 (2016): 851–856. https://orcid.org/0000-0002-3978-8478 en http://dx.doi.org/10.1007/s11468-015-0118-9 Plasmonics Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. Springer Science+Business Media New York application/pdf Springer US Springer US |
| spellingShingle | Ekşioğlu, Yasa Petráček, Jiří Cetin, Arif Engin Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices |
| title | Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices |
| title_full | Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices |
| title_fullStr | Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices |
| title_full_unstemmed | Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices |
| title_short | Optical Response of Plasmonic Nanohole Arrays: Comparison of Square and Hexagonal Lattices |
| title_sort | optical response of plasmonic nanohole arrays comparison of square and hexagonal lattices |
| url | http://hdl.handle.net/1721.1/104652 https://orcid.org/0000-0002-3978-8478 |
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