Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy

Abstract We report a sensing platform for surface-enhanced infrared absorption (SEIRA) spectroscopy, based on Fano metamaterials (FMMs) on dielectric nanopedestals. FMMs consist of two parallel gold (Au) nanorod antennas, with a small horizontal coupler attached to one of the nanorod antenna. When p...

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Autores principales:	Yongseok Jung, Inyong Hwang, Jaeyeon Yu, Jihye Lee, Jun-Hyuk Choi, Jun-Ho Jeong, Joo-Yun Jung, Jongwon Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/09351147236c47478a11d8cb52edf5c7
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spelling	oai:doaj.org-article:09351147236c47478a11d8cb52edf5c72021-12-02T15:08:48ZFano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy10.1038/s41598-019-44396-92045-2322https://doaj.org/article/09351147236c47478a11d8cb52edf5c72019-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-44396-9https://doaj.org/toc/2045-2322Abstract We report a sensing platform for surface-enhanced infrared absorption (SEIRA) spectroscopy, based on Fano metamaterials (FMMs) on dielectric nanopedestals. FMMs consist of two parallel gold (Au) nanorod antennas, with a small horizontal coupler attached to one of the nanorod antenna. When placed on SiO2 dielectric nanopedestals, which exhibit strong field enhancements caused by the interference between subradiant and superradiant plasmonic resonances, they provide the highly enhanced E-field intensities formed near the Au nanoantenna, which can provide more enhanced molecular detection signals. Here, the sensing characteristics of FMMs on nanopedestals structure was confirmed by comparison with FMMs on an unetched SiO2 substrate as a control sample. The control FMMs and the FMMs on nanopedestals were carefully designed to excite Fano resonance near the target 1-octadecanethiol (ODT) fingerprint vibrations. The FMMs were fabricated by using nanoimprint lithography and the nanopedestal structures were formed by isotropic dry-etching. The experimental reflection spectra containing the enhanced absorption signals of the ODT monolayer molecules was analyzed using temporal coupled-mode theory. The FMMs on nanopedestals achieved over 7% of reflection difference signal, which was 1.7 times higher signal than the one from the control FMMs. Based on the FMMs on nanopedestal structures proposed in this study, it may be widely applied to future spectroscopy and sensor applications requiring ultrasensitive detection capability.Yongseok JungInyong HwangJaeyeon YuJihye LeeJun-Hyuk ChoiJun-Ho JeongJoo-Yun JungJongwon LeeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-8 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yongseok Jung Inyong Hwang Jaeyeon Yu Jihye Lee Jun-Hyuk Choi Jun-Ho Jeong Joo-Yun Jung Jongwon Lee Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy
description	Abstract We report a sensing platform for surface-enhanced infrared absorption (SEIRA) spectroscopy, based on Fano metamaterials (FMMs) on dielectric nanopedestals. FMMs consist of two parallel gold (Au) nanorod antennas, with a small horizontal coupler attached to one of the nanorod antenna. When placed on SiO2 dielectric nanopedestals, which exhibit strong field enhancements caused by the interference between subradiant and superradiant plasmonic resonances, they provide the highly enhanced E-field intensities formed near the Au nanoantenna, which can provide more enhanced molecular detection signals. Here, the sensing characteristics of FMMs on nanopedestals structure was confirmed by comparison with FMMs on an unetched SiO2 substrate as a control sample. The control FMMs and the FMMs on nanopedestals were carefully designed to excite Fano resonance near the target 1-octadecanethiol (ODT) fingerprint vibrations. The FMMs were fabricated by using nanoimprint lithography and the nanopedestal structures were formed by isotropic dry-etching. The experimental reflection spectra containing the enhanced absorption signals of the ODT monolayer molecules was analyzed using temporal coupled-mode theory. The FMMs on nanopedestals achieved over 7% of reflection difference signal, which was 1.7 times higher signal than the one from the control FMMs. Based on the FMMs on nanopedestal structures proposed in this study, it may be widely applied to future spectroscopy and sensor applications requiring ultrasensitive detection capability.
format	article
author	Yongseok Jung Inyong Hwang Jaeyeon Yu Jihye Lee Jun-Hyuk Choi Jun-Ho Jeong Joo-Yun Jung Jongwon Lee
author_facet	Yongseok Jung Inyong Hwang Jaeyeon Yu Jihye Lee Jun-Hyuk Choi Jun-Ho Jeong Joo-Yun Jung Jongwon Lee
author_sort	Yongseok Jung
title	Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy
title_short	Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy
title_full	Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy
title_fullStr	Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy
title_full_unstemmed	Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy
title_sort	fano metamaterials on nanopedestals for plasmon-enhanced infrared spectroscopy
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/09351147236c47478a11d8cb52edf5c7
work_keys_str_mv	AT yongseokjung fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT inyonghwang fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT jaeyeonyu fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT jihyelee fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT junhyukchoi fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT junhojeong fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT jooyunjung fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy AT jongwonlee fanometamaterialsonnanopedestalsforplasmonenhancedinfraredspectroscopy
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Fano Metamaterials on Nanopedestals for Plasmon-Enhanced Infrared Spectroscopy

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