High aspect ratio plasmonic nanostructures for sensing applications

Birgit Päivänranta; Hannes Merbold; Reto Giannini; Luca Büchi; Sergey Gorelick; Christian David; Jörg F. Löffler; Thomas Feurer; Yasin Ekinci

doi:10.1021/nn201529x

High aspect ratio plasmonic nanostructures for sensing applications

Birgit Päivänranta, Hannes Merbold, Reto Giannini, Luca Büchi, Sergey Gorelick, Christian David, Jörg F. Löffler, Thomas Feurer, Yasin Ekinci (Corresponding Author)

VTT Technical Research Centre of Finland

Research output: Contribution to journal › Article › Scientific › peer-review

77 Citations (Scopus)

Abstract

We present an experimental and theoretical study of plasmonic modes in high aspect ratio nanostructures in the visible wavelength region and demonstrate their high performance for sensing applications. Ordered and well-defined plasmonic structures with various cross-sectional profiles and heights are obtained using a top-down fabrication process. We show that, compared to cylindrical nanorods, structures with split-ring resonator-like cross sections have great potential for powerful sensing due to a pronounced polarization dependence, strong field enhancement, structural tunability, and improved mechanical stability. The plasmonic structures under study exhibit high sensitivities, up to nearly 600 nm/RIU, and figures of merit above 20.

Original language	English
Pages (from-to)	6374-6382
Journal	ACS Nano
Volume	5
Issue number	8
DOIs	https://doi.org/10.1021/nn201529x
Publication status	Published - 2011
MoE publication type	A1 Journal article-refereed

Keywords

plasmonics
biosensing
nanofabrication
split-ring resonators
high aspect ratio

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10.1021/nn201529x

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title = "High aspect ratio plasmonic nanostructures for sensing applications",

abstract = "We present an experimental and theoretical study of plasmonic modes in high aspect ratio nanostructures in the visible wavelength region and demonstrate their high performance for sensing applications. Ordered and well-defined plasmonic structures with various cross-sectional profiles and heights are obtained using a top-down fabrication process. We show that, compared to cylindrical nanorods, structures with split-ring resonator-like cross sections have great potential for powerful sensing due to a pronounced polarization dependence, strong field enhancement, structural tunability, and improved mechanical stability. The plasmonic structures under study exhibit high sensitivities, up to nearly 600 nm/RIU, and figures of merit above 20.",

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T1 - High aspect ratio plasmonic nanostructures for sensing applications

AU - Päivänranta, Birgit

AU - Merbold, Hannes

AU - Giannini, Reto

AU - Büchi, Luca

AU - Gorelick, Sergey

AU - David, Christian

AU - Löffler, Jörg F.

AU - Feurer, Thomas

AU - Ekinci, Yasin

PY - 2011

Y1 - 2011

N2 - We present an experimental and theoretical study of plasmonic modes in high aspect ratio nanostructures in the visible wavelength region and demonstrate their high performance for sensing applications. Ordered and well-defined plasmonic structures with various cross-sectional profiles and heights are obtained using a top-down fabrication process. We show that, compared to cylindrical nanorods, structures with split-ring resonator-like cross sections have great potential for powerful sensing due to a pronounced polarization dependence, strong field enhancement, structural tunability, and improved mechanical stability. The plasmonic structures under study exhibit high sensitivities, up to nearly 600 nm/RIU, and figures of merit above 20.

AB - We present an experimental and theoretical study of plasmonic modes in high aspect ratio nanostructures in the visible wavelength region and demonstrate their high performance for sensing applications. Ordered and well-defined plasmonic structures with various cross-sectional profiles and heights are obtained using a top-down fabrication process. We show that, compared to cylindrical nanorods, structures with split-ring resonator-like cross sections have great potential for powerful sensing due to a pronounced polarization dependence, strong field enhancement, structural tunability, and improved mechanical stability. The plasmonic structures under study exhibit high sensitivities, up to nearly 600 nm/RIU, and figures of merit above 20.

KW - plasmonics

KW - biosensing

KW - nanofabrication

KW - split-ring resonators

KW - high aspect ratio

U2 - 10.1021/nn201529x

DO - 10.1021/nn201529x

M3 - Article

SN - 1936-0851

VL - 5

SP - 6374

EP - 6382

JO - ACS Nano

JF - ACS Nano

IS - 8

ER -

High aspect ratio plasmonic nanostructures for sensing applications

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Keywords

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