High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing

Realizing strong plasmon–vibration interactions between infrared-active vibrational bands and resonating plasmonic metasurfaces opens up the possibilities for ultrasensitive label-free detection of chemical and biological agents. The key prerequisites for exploiting strong plasmon–vibration interact...

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Main Authors: Dayal, Govind, Chin, Xin Yu, Soci, Cesare, Singh, Ranjan
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2017
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Online Access:https://hdl.handle.net/10356/85787
http://hdl.handle.net/10220/43869
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-857872020-03-07T12:37:04Z High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing Dayal, Govind Chin, Xin Yu Soci, Cesare Singh, Ranjan School of Physical and Mathematical Sciences Sensing Fano Resonances Realizing strong plasmon–vibration interactions between infrared-active vibrational bands and resonating plasmonic metasurfaces opens up the possibilities for ultrasensitive label-free detection of chemical and biological agents. The key prerequisites for exploiting strong plasmon–vibration interactions in practical spectroscopy are structures, which provide giant field enhancement that highly depends on the line-width and line-shape of the plasmonic resonances supported by these structures. Here, multiband surface-enhanced infrared absorption (SEIRA) of poly(methyl methacrylate) (PMMA) is demonstrated. The line-width and line-shape of the proposed plasmonic metasurface can be readily tuned to match the multiple vibrational modes of the PMMA to sense the prohibitively weak fingerprints. The tightly coupled system exhibits mode splitting in the optical spectrum resulting in new hybrid plasmon–phonon modes of PMMA. Such a strong interaction of high-Q Fano resonances to multiple phonon modes in ultrathin film analytes over a broadband spectral range could be step forward towards ultrasensitive sensing of biological and chemical molecules. MOE (Min. of Education, S’pore) 2017-10-12T07:36:33Z 2019-12-06T16:10:12Z 2017-10-12T07:36:33Z 2019-12-06T16:10:12Z 2016 Journal Article Dayal, G., Chin, X. Y., Soci, C., & Singh, R. (2017). High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing. Advanced Optical Materials, 5(2), 1600559-. 2195-1071 https://hdl.handle.net/10356/85787 http://hdl.handle.net/10220/43869 10.1002/adom.201600559 en Advanced Optical Materials © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Sensing
Fano Resonances
spellingShingle Sensing
Fano Resonances
Dayal, Govind
Chin, Xin Yu
Soci, Cesare
Singh, Ranjan
High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing
description Realizing strong plasmon–vibration interactions between infrared-active vibrational bands and resonating plasmonic metasurfaces opens up the possibilities for ultrasensitive label-free detection of chemical and biological agents. The key prerequisites for exploiting strong plasmon–vibration interactions in practical spectroscopy are structures, which provide giant field enhancement that highly depends on the line-width and line-shape of the plasmonic resonances supported by these structures. Here, multiband surface-enhanced infrared absorption (SEIRA) of poly(methyl methacrylate) (PMMA) is demonstrated. The line-width and line-shape of the proposed plasmonic metasurface can be readily tuned to match the multiple vibrational modes of the PMMA to sense the prohibitively weak fingerprints. The tightly coupled system exhibits mode splitting in the optical spectrum resulting in new hybrid plasmon–phonon modes of PMMA. Such a strong interaction of high-Q Fano resonances to multiple phonon modes in ultrathin film analytes over a broadband spectral range could be step forward towards ultrasensitive sensing of biological and chemical molecules.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Dayal, Govind
Chin, Xin Yu
Soci, Cesare
Singh, Ranjan
format Article
author Dayal, Govind
Chin, Xin Yu
Soci, Cesare
Singh, Ranjan
author_sort Dayal, Govind
title High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing
title_short High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing
title_full High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing
title_fullStr High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing
title_full_unstemmed High-Q Plasmonic Fano Resonance for Multiband Surface-Enhanced Infrared Absorption of Molecular Vibrational Sensing
title_sort high-q plasmonic fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing
publishDate 2017
url https://hdl.handle.net/10356/85787
http://hdl.handle.net/10220/43869
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