Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial

We study the presence of dark and bright modes in a planar metamaterial with a double rod unit cell introducing geometric asymmetry in rod lengths. The dark mode displays a Fano-type resonance with a sharp asymmetric profile, rendering it far more sensitive than the bright mode to slight variations...

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Detalles Bibliográficos
Autores principales: Omaghali, Ndubuisi E. J., Tkachenko, Volodymyr, Andreone, Antonello, Abbate, Giancarlo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2013
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926557/
https://www.ncbi.nlm.nih.gov/pubmed/24368700
http://dx.doi.org/10.3390/s140100272
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author Omaghali, Ndubuisi E. J.
Tkachenko, Volodymyr
Andreone, Antonello
Abbate, Giancarlo
author_facet Omaghali, Ndubuisi E. J.
Tkachenko, Volodymyr
Andreone, Antonello
Abbate, Giancarlo
author_sort Omaghali, Ndubuisi E. J.
collection PubMed
description We study the presence of dark and bright modes in a planar metamaterial with a double rod unit cell introducing geometric asymmetry in rod lengths. The dark mode displays a Fano-type resonance with a sharp asymmetric profile, rendering it far more sensitive than the bright mode to slight variations of the dielectric environment. This peculiar feature may envisage the possible application of the asymmetric dimer metamaterial as an optical sensor for chemical or biological analysis, provided that the effect of material losses on the dark mode quality factor is properly taken into account.
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spelling pubmed-39265572014-02-18 Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial Omaghali, Ndubuisi E. J. Tkachenko, Volodymyr Andreone, Antonello Abbate, Giancarlo Sensors (Basel) Article We study the presence of dark and bright modes in a planar metamaterial with a double rod unit cell introducing geometric asymmetry in rod lengths. The dark mode displays a Fano-type resonance with a sharp asymmetric profile, rendering it far more sensitive than the bright mode to slight variations of the dielectric environment. This peculiar feature may envisage the possible application of the asymmetric dimer metamaterial as an optical sensor for chemical or biological analysis, provided that the effect of material losses on the dark mode quality factor is properly taken into account. Molecular Diversity Preservation International (MDPI) 2013-12-24 /pmc/articles/PMC3926557/ /pubmed/24368700 http://dx.doi.org/10.3390/s140100272 Text en © 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Omaghali, Ndubuisi E. J.
Tkachenko, Volodymyr
Andreone, Antonello
Abbate, Giancarlo
Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial
title Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial
title_full Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial
title_fullStr Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial
title_full_unstemmed Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial
title_short Optical Sensing Using Dark Mode Excitation in an Asymmetric Dimer Metamaterial
title_sort optical sensing using dark mode excitation in an asymmetric dimer metamaterial
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926557/
https://www.ncbi.nlm.nih.gov/pubmed/24368700
http://dx.doi.org/10.3390/s140100272
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AT andreoneantonello opticalsensingusingdarkmodeexcitationinanasymmetricdimermetamaterial
AT abbategiancarlo opticalsensingusingdarkmodeexcitationinanasymmetricdimermetamaterial

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