High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing

Maxime Couture, Thibault Brule, Stacey Laing, Wenli Cui, Mitradeep Sarkar, Benjamin Charron, Karen Faulds, Wei Peng, Michael Canva, Jean-Francois Masson

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We report that gold-coated nanodisk arrays of nearly micron periodicity have high figure of merit (FOM) and sensitivity necessary for plasmonic refractometric sensing, with the added benefit of suitability for surface-enhanced Raman scattering (SERS), large scale microfabrication using standard photolithographic techniques and a simple instrumental setup. Gold nanodisk arrays were covered with a gold layer to excite the Bragg modes (BM) which are the propagative surface plasmons localized by the diffraction from the disk array. This generated surface-guided modes, localized as standing waves, leading to highly confined fields confirmed by a mapping of the SERS intensity and numerical simulations with 3D finite element method (3D FEM). The optimal gold-coated nanodisk arrays were applied for refractometric sensing in transmission spectroscopy with better performance than nanohole arrays and they were integrated to a 96-well plate reader for detection of IgY proteins in the nM range in PBS. The potential for sensing in biofluids was assessed with IgG detection in 1:1 diluted urine. The structure exhibits a high FOM of up to 46, exceeding the FOM of structures supporting surface plasmon polaritons (SPPs) and comparable to more complex nanostructures, demonstrating that sub-wavelength features are not necessary for high performance plasmonic sensing.
LanguageEnglish
Article number1700908
Number of pages10
JournalSmall
Volume13
Issue number38
Early online date21 Aug 2017
DOIs
Publication statusPublished - 11 Oct 2017

Fingerprint

Gold
Raman Spectrum Analysis
Raman scattering
Microtechnology
Nanostructures
Periodicity
Plasmons
Microfabrication
Spectrum Analysis
Immunoglobulin G
Urine
Diffraction
Spectroscopy
Proteins
Finite element method
Wavelength
Computer simulation

Keywords

  • gold-coated nanodisk array
  • high FOM
  • multi-well plate reader
  • SERS
  • plasmonic sensing
  • Bragg modes
  • surface-enhanced Raman scattering

Cite this

Couture, M., Brule, T., Laing, S., Cui, W., Sarkar, M., Charron, B., ... Masson, J-F. (2017). High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing. Small, 13(38), [1700908]. https://doi.org/10.1002/smll.201700908
Couture, Maxime ; Brule, Thibault ; Laing, Stacey ; Cui, Wenli ; Sarkar, Mitradeep ; Charron, Benjamin ; Faulds, Karen ; Peng, Wei ; Canva, Michael ; Masson, Jean-Francois. / High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing. In: Small. 2017 ; Vol. 13, No. 38.
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abstract = "We report that gold-coated nanodisk arrays of nearly micron periodicity have high figure of merit (FOM) and sensitivity necessary for plasmonic refractometric sensing, with the added benefit of suitability for surface-enhanced Raman scattering (SERS), large scale microfabrication using standard photolithographic techniques and a simple instrumental setup. Gold nanodisk arrays were covered with a gold layer to excite the Bragg modes (BM) which are the propagative surface plasmons localized by the diffraction from the disk array. This generated surface-guided modes, localized as standing waves, leading to highly confined fields confirmed by a mapping of the SERS intensity and numerical simulations with 3D finite element method (3D FEM). The optimal gold-coated nanodisk arrays were applied for refractometric sensing in transmission spectroscopy with better performance than nanohole arrays and they were integrated to a 96-well plate reader for detection of IgY proteins in the nM range in PBS. The potential for sensing in biofluids was assessed with IgG detection in 1:1 diluted urine. The structure exhibits a high FOM of up to 46, exceeding the FOM of structures supporting surface plasmon polaritons (SPPs) and comparable to more complex nanostructures, demonstrating that sub-wavelength features are not necessary for high performance plasmonic sensing.",
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Couture, M, Brule, T, Laing, S, Cui, W, Sarkar, M, Charron, B, Faulds, K, Peng, W, Canva, M & Masson, J-F 2017, 'High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing' Small, vol. 13, no. 38, 1700908. https://doi.org/10.1002/smll.201700908

High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing. / Couture, Maxime; Brule, Thibault; Laing, Stacey; Cui, Wenli; Sarkar, Mitradeep; Charron, Benjamin; Faulds, Karen; Peng, Wei; Canva, Michael; Masson, Jean-Francois.

In: Small, Vol. 13, No. 38, 1700908, 11.10.2017.

Research output: Contribution to journalArticle

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T1 - High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing

AU - Couture, Maxime

AU - Brule, Thibault

AU - Laing, Stacey

AU - Cui, Wenli

AU - Sarkar, Mitradeep

AU - Charron, Benjamin

AU - Faulds, Karen

AU - Peng, Wei

AU - Canva, Michael

AU - Masson, Jean-Francois

N1 - This is the peer reviewed version of the following article: Couture, M., Brule, T., Laing, S., Cui, W., Sarkar, M., Charron, B., ... Masson, J-F. (2017). High figure of merit (FOM) of Bragg modes in Au-coated nanodisk arrays for plasmonic sensing. Small., which has been published in final form at http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1613-6829/. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving

PY - 2017/10/11

Y1 - 2017/10/11

N2 - We report that gold-coated nanodisk arrays of nearly micron periodicity have high figure of merit (FOM) and sensitivity necessary for plasmonic refractometric sensing, with the added benefit of suitability for surface-enhanced Raman scattering (SERS), large scale microfabrication using standard photolithographic techniques and a simple instrumental setup. Gold nanodisk arrays were covered with a gold layer to excite the Bragg modes (BM) which are the propagative surface plasmons localized by the diffraction from the disk array. This generated surface-guided modes, localized as standing waves, leading to highly confined fields confirmed by a mapping of the SERS intensity and numerical simulations with 3D finite element method (3D FEM). The optimal gold-coated nanodisk arrays were applied for refractometric sensing in transmission spectroscopy with better performance than nanohole arrays and they were integrated to a 96-well plate reader for detection of IgY proteins in the nM range in PBS. The potential for sensing in biofluids was assessed with IgG detection in 1:1 diluted urine. The structure exhibits a high FOM of up to 46, exceeding the FOM of structures supporting surface plasmon polaritons (SPPs) and comparable to more complex nanostructures, demonstrating that sub-wavelength features are not necessary for high performance plasmonic sensing.

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KW - gold-coated nanodisk array

KW - high FOM

KW - multi-well plate reader

KW - SERS

KW - plasmonic sensing

KW - Bragg modes

KW - surface-enhanced Raman scattering

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