Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials

Abstract Plasmonic metamaterials have overcome fundamental limitations in conventional optics by their capability to engineer material resonances and dispersions at will, holding great promise for sensing applications. Recent demonstrations of metamaterial sensors, however, have mainly relied on the...

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Autores principales:	Atsushi Ishikawa, Shuhei Hara, Takuo Tanaka, Yasuhiko Hayashi, Kenji Tsuruta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8246449c52e44071b1f33f78086a62ab
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spelling	oai:doaj.org-article:8246449c52e44071b1f33f78086a62ab2021-12-02T12:31:48ZCross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials10.1038/s41598-017-03545-82045-2322https://doaj.org/article/8246449c52e44071b1f33f78086a62ab2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03545-8https://doaj.org/toc/2045-2322Abstract Plasmonic metamaterials have overcome fundamental limitations in conventional optics by their capability to engineer material resonances and dispersions at will, holding great promise for sensing applications. Recent demonstrations of metamaterial sensors, however, have mainly relied on their resonant nature for strong optical interactions with molecules, but few examples fully exploit their functionality to manipulate the polarization of light. Here, we present cross-polarized surface-enhanced infrared absorption (SEIRA) by the Fano-resonant asymmetric metamaterial allowing for strong background suppression as well as significant field enhancement. The metamaterial is designed to exhibit the controlled Fano resonance with the cross-polarization conversion property at 1730 cm−1, which spectrally overlaps with the C=O vibrational mode. In the cross-polarized SEIRA measurement, the C=O mode of poly(methyl methacrylate) molecules is clearly observed as a distinct dip within a Fano-resonant transmission peak of the metamaterial. The vibrational signal contrast is then improved based on the cross-polarized detection scheme where only the light interacting with the metamaterial-molecular coupled system is detected by totally eliminating the unwanted background light. Our metamaterial approach achieves the zeptomole sensitivity with a large signal-to-noise ratio in the far-field measurement, paving the way toward the realization of ultrasensitive IR inspection technologies.Atsushi IshikawaShuhei HaraTakuo TanakaYasuhiko HayashiKenji TsurutaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Atsushi Ishikawa Shuhei Hara Takuo Tanaka Yasuhiko Hayashi Kenji Tsuruta Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials
description	Abstract Plasmonic metamaterials have overcome fundamental limitations in conventional optics by their capability to engineer material resonances and dispersions at will, holding great promise for sensing applications. Recent demonstrations of metamaterial sensors, however, have mainly relied on their resonant nature for strong optical interactions with molecules, but few examples fully exploit their functionality to manipulate the polarization of light. Here, we present cross-polarized surface-enhanced infrared absorption (SEIRA) by the Fano-resonant asymmetric metamaterial allowing for strong background suppression as well as significant field enhancement. The metamaterial is designed to exhibit the controlled Fano resonance with the cross-polarization conversion property at 1730 cm−1, which spectrally overlaps with the C=O vibrational mode. In the cross-polarized SEIRA measurement, the C=O mode of poly(methyl methacrylate) molecules is clearly observed as a distinct dip within a Fano-resonant transmission peak of the metamaterial. The vibrational signal contrast is then improved based on the cross-polarized detection scheme where only the light interacting with the metamaterial-molecular coupled system is detected by totally eliminating the unwanted background light. Our metamaterial approach achieves the zeptomole sensitivity with a large signal-to-noise ratio in the far-field measurement, paving the way toward the realization of ultrasensitive IR inspection technologies.
format	article
author	Atsushi Ishikawa Shuhei Hara Takuo Tanaka Yasuhiko Hayashi Kenji Tsuruta
author_facet	Atsushi Ishikawa Shuhei Hara Takuo Tanaka Yasuhiko Hayashi Kenji Tsuruta
author_sort	Atsushi Ishikawa
title	Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials
title_short	Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials
title_full	Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials
title_fullStr	Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials
title_full_unstemmed	Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials
title_sort	cross-polarized surface-enhanced infrared spectroscopy by fano-resonant asymmetric metamaterials
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8246449c52e44071b1f33f78086a62ab
work_keys_str_mv	AT atsushiishikawa crosspolarizedsurfaceenhancedinfraredspectroscopybyfanoresonantasymmetricmetamaterials AT shuheihara crosspolarizedsurfaceenhancedinfraredspectroscopybyfanoresonantasymmetricmetamaterials AT takuotanaka crosspolarizedsurfaceenhancedinfraredspectroscopybyfanoresonantasymmetricmetamaterials AT yasuhikohayashi crosspolarizedsurfaceenhancedinfraredspectroscopybyfanoresonantasymmetricmetamaterials AT kenjitsuruta crosspolarizedsurfaceenhancedinfraredspectroscopybyfanoresonantasymmetricmetamaterials
_version_	1718394288166928384

Cross-Polarized Surface-Enhanced Infrared Spectroscopy by Fano-Resonant Asymmetric Metamaterials

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