ID | 55637 |
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Author |
Ishikawa, Atsushi
Department of Electrical and Electronic Engineering, Okayama University
ORCID
Kaken ID
publons
Hara, Shuhei
Department of Electrical and Electronic Engineering, Okayama University
Tanaka, Takuo
Metamaterials Laboratory, RIKEN
Zhan, Xiang
NSF Nanoscale Science and Engineering Center, University of California
Tsuruta, Kenji
Department of Electrical and Electronic Engineering, Okayama University
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Abstract | High-density and long-lived plasmonic hot-spots are an ideal system for high-sensitive surface-enhanced infrared absorption (SEIRA), but these conditions arc usually incompatible due to unwanted near-field coupling between the adjacent unit structures. Here, by fully controlling plasmonic interference in a metamaterial lattice, we experimentally demonstrate densely packed long-lived quadrupole plasmons for high-sensitive SEIRA. The metamaterial consists of a strongly coupled array of super-and sub-radiant plasmonic elements to exhibit an electromagnetic transparency mode at 1730 cm(-1), which spectrally overlaps with the C=O vibrational mode. In the SEIRA measurement, the C=O mode of poly(methyl methacrylate) molecules is clearly observed as a distinct dip within a transmission peak of the metamaterial. The corresponding numerical simulations reveal that constructive interference uniformly forms coherent quadrupole plasmons over the metamaterial lattice, leading to a stronger molecular signal from the system. Our metamaterial approach provides a robust way to construct ideal hot-spots over the sample, paving the way toward a reliable sensing platform of advanced infrared inspection technologies. Published by AIP Publishing.
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Note | This is an Accepted Manuscript of an article published by American Institute of Physics
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Published Date | 2017-12-11
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Publication Title |
Applied Physics Letters
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Volume | volume111
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Issue | issue24
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Publisher | American Institute of Physics
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Start Page | 243106
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ISSN | 0003-6951
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NCID | AA00543431
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Content Type |
Journal Article
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language |
Japanese
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OAI-PMH Set |
岡山大学
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Copyright Holders | https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
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File Version | author
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DOI | |
Web of Science KeyUT | |
Related Url | isVersionOf https://doi.org/10.1063/1.5004703
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