Polarization invariant plasmonic nanostructures for sensing applications

Abstract Optics-based sensing platform working under unpolarized light illumination is of practical importance in the sensing applications. For this reason, sensing platforms based on localized surface plasmons are preferred to their integrated optics counterparts for their simple mode excitation an...

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Autores principales:	Landobasa Y. M. Tobing, Geat-Yee Goh, Aaron D. Mueller, Lin Ke, Yu Luo, Dao-Hua Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a33eb471af8e4eb2b60c00eac10d8e44
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spelling	oai:doaj.org-article:a33eb471af8e4eb2b60c00eac10d8e442021-12-02T11:41:10ZPolarization invariant plasmonic nanostructures for sensing applications10.1038/s41598-017-08020-y2045-2322https://doaj.org/article/a33eb471af8e4eb2b60c00eac10d8e442017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08020-yhttps://doaj.org/toc/2045-2322Abstract Optics-based sensing platform working under unpolarized light illumination is of practical importance in the sensing applications. For this reason, sensing platforms based on localized surface plasmons are preferred to their integrated optics counterparts for their simple mode excitation and inexpensive implementation. However, their optical response under unpolarized light excitation is typically weak due to their strong polarization dependence. Herein, the role of rotational symmetry for realizing robust sensing platform exhibiting strong optical contrast and high sensitivity is explored. Specifically, gammadion and star-shaped gold nanostructures with different internal and external rotational symmetries are fabricated and studied in detail, from which their mode characteristics are demonstrated as superposition of their constituent longitudinal plasmons that are in conductive coupling with each other. We demonstrate that introducing and increasing internal rotational symmetry would lead to the enhancement in optical contrast up to ~3x under unpolarized light illumination. Finally, we compare the sensing performances of rotationally symmetric gold nanostructures with a more rigorous figure-of-merit based on sensitivity, Q-factor, and spectral contrast.Landobasa Y. M. TobingGeat-Yee GohAaron D. MuellerLin KeYu LuoDao-Hua ZhangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-14 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Landobasa Y. M. Tobing Geat-Yee Goh Aaron D. Mueller Lin Ke Yu Luo Dao-Hua Zhang Polarization invariant plasmonic nanostructures for sensing applications
description	Abstract Optics-based sensing platform working under unpolarized light illumination is of practical importance in the sensing applications. For this reason, sensing platforms based on localized surface plasmons are preferred to their integrated optics counterparts for their simple mode excitation and inexpensive implementation. However, their optical response under unpolarized light excitation is typically weak due to their strong polarization dependence. Herein, the role of rotational symmetry for realizing robust sensing platform exhibiting strong optical contrast and high sensitivity is explored. Specifically, gammadion and star-shaped gold nanostructures with different internal and external rotational symmetries are fabricated and studied in detail, from which their mode characteristics are demonstrated as superposition of their constituent longitudinal plasmons that are in conductive coupling with each other. We demonstrate that introducing and increasing internal rotational symmetry would lead to the enhancement in optical contrast up to ~3x under unpolarized light illumination. Finally, we compare the sensing performances of rotationally symmetric gold nanostructures with a more rigorous figure-of-merit based on sensitivity, Q-factor, and spectral contrast.
format	article
author	Landobasa Y. M. Tobing Geat-Yee Goh Aaron D. Mueller Lin Ke Yu Luo Dao-Hua Zhang
author_facet	Landobasa Y. M. Tobing Geat-Yee Goh Aaron D. Mueller Lin Ke Yu Luo Dao-Hua Zhang
author_sort	Landobasa Y. M. Tobing
title	Polarization invariant plasmonic nanostructures for sensing applications
title_short	Polarization invariant plasmonic nanostructures for sensing applications
title_full	Polarization invariant plasmonic nanostructures for sensing applications
title_fullStr	Polarization invariant plasmonic nanostructures for sensing applications
title_full_unstemmed	Polarization invariant plasmonic nanostructures for sensing applications
title_sort	polarization invariant plasmonic nanostructures for sensing applications
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a33eb471af8e4eb2b60c00eac10d8e44
work_keys_str_mv	AT landobasaymtobing polarizationinvariantplasmonicnanostructuresforsensingapplications AT geatyeegoh polarizationinvariantplasmonicnanostructuresforsensingapplications AT aarondmueller polarizationinvariantplasmonicnanostructuresforsensingapplications AT linke polarizationinvariantplasmonicnanostructuresforsensingapplications AT yuluo polarizationinvariantplasmonicnanostructuresforsensingapplications AT daohuazhang polarizationinvariantplasmonicnanostructuresforsensingapplications
_version_	1718395476416397312

Polarization invariant plasmonic nanostructures for sensing applications

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