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3D analysis of surface Plasmon dispersion for SERS sensor based on inverted pyramid nanostructures

3D analysis of surface Plasmon dispersion for SERS sensor based on inverted pyramid nanostructures
3D analysis of surface Plasmon dispersion for SERS sensor based on inverted pyramid nanostructures
Surface enhanced Raman scattering (SERS) can be used to amplify the Raman cross-section of signals by several orders of magnitude, when a mixed photon-Plasmon mode (surface Plasmon polaritons) couples to molecules on a nano textured metallo-dielectric substrate. In this paper we demonstrate a comprehensive 3D computational model based on Rigorous coupled wave analysis (RCWA) for the purpose of analysing propagating and localised surface Plasmon polaritons supported by planar SERS substrates based on periodic array of metal coated inverted pyramidal nanostructures. Although studies [1, 2] have explored the optical properties of inverted square pyramidal pits using simulation and experimentation, there has yet been no investigation performed on rectangular inverted pyramidal pits. Here we perform 3D modelling and simulation on rectangular pit arrays with aspect ratio 1:1.2 over 400nm thick gold. We investigate the effect of incident polarisation and electric-field density within the pits and show that inverted rectangular pyramidal pit array can be used as highly effective SERS and Plasmonic substrates.
Oo, Swe Zin
6495f6da-8f17-4484-98fb-6151b4efbd9a
Charlton, M.D.B.
fcf86ab0-8f34-411a-b576-4f684e51e274
Pollard, M.E.
1642c7e4-7715-435d-9b5d-ff033744995e
Pearce, S.
54891fdd-25ca-4768-ab4d-27f51be1e3e9
Chen, R.Y.
78027085-99ff-48a3-85d3-704cd3aa7fc6
Oo, Swe Zin
6495f6da-8f17-4484-98fb-6151b4efbd9a
Charlton, M.D.B.
fcf86ab0-8f34-411a-b576-4f684e51e274
Pollard, M.E.
1642c7e4-7715-435d-9b5d-ff033744995e
Pearce, S.
54891fdd-25ca-4768-ab4d-27f51be1e3e9
Chen, R.Y.
78027085-99ff-48a3-85d3-704cd3aa7fc6

Oo, Swe Zin, Charlton, M.D.B., Pollard, M.E., Pearce, S. and Chen, R.Y. (2012) 3D analysis of surface Plasmon dispersion for SERS sensor based on inverted pyramid nanostructures. Photonics West 2012, San Francisco, United States. 21 - 26 Jan 2012. (doi:10.1117/12.907467).

Record type: Conference or Workshop Item (Paper)

Abstract

Surface enhanced Raman scattering (SERS) can be used to amplify the Raman cross-section of signals by several orders of magnitude, when a mixed photon-Plasmon mode (surface Plasmon polaritons) couples to molecules on a nano textured metallo-dielectric substrate. In this paper we demonstrate a comprehensive 3D computational model based on Rigorous coupled wave analysis (RCWA) for the purpose of analysing propagating and localised surface Plasmon polaritons supported by planar SERS substrates based on periodic array of metal coated inverted pyramidal nanostructures. Although studies [1, 2] have explored the optical properties of inverted square pyramidal pits using simulation and experimentation, there has yet been no investigation performed on rectangular inverted pyramidal pits. Here we perform 3D modelling and simulation on rectangular pit arrays with aspect ratio 1:1.2 over 400nm thick gold. We investigate the effect of incident polarisation and electric-field density within the pits and show that inverted rectangular pyramidal pit array can be used as highly effective SERS and Plasmonic substrates.

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More information

Published date: 9 February 2012
Venue - Dates: Photonics West 2012, San Francisco, United States, 2012-01-21 - 2012-01-26
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 350327
URI: https://eprints.soton.ac.uk/id/eprint/350327
PURE UUID: 792b8c2e-cefc-488d-a490-81aa669ae302

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Date deposited: 25 Mar 2013 16:14
Last modified: 27 Feb 2019 17:31

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Contributors

Author: Swe Zin Oo
Author: M.D.B. Charlton
Author: M.E. Pollard
Author: S. Pearce
Author: R.Y. Chen

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