Transmittance and surface intensity in 3D composite plasmonic waveguides
Transmittance and surface intensity in 3D composite plasmonic waveguides
A detailed theoretical study of composite plasmonic waveguide structures is reported. Expressions for modal expansion coefficients, optical transmittance and surface intensity are presented and used to describe the behavior of dielectric channel waveguides containing a short gold-coated section. The superstrate refractive index is shown to control modal beating and modal attenuation in the gold-coated region leading to distinctive features in the surface intensity and device transmittance. The model presented allows detailed prediction of device performance, enabling improved design of highly sensitive miniature devices for evanescent refractometry and vibrational spectroscopy, and can be extended to the design and optimization of composite waveguides structures with nano-patterned overlayers.
14407-14423
Karabchevsky, Alina
26a2c158-ef26-43be-8f10-b37e04baa017
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Zervas, Michalis N.
1840a474-dd50-4a55-ab74-6f086aa3f701
1 June 2015
Karabchevsky, Alina
26a2c158-ef26-43be-8f10-b37e04baa017
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Zervas, Michalis N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Karabchevsky, Alina, Wilkinson, James S. and Zervas, Michalis N.
(2015)
Transmittance and surface intensity in 3D composite plasmonic waveguides.
Optics Express, 23 (11), .
(doi:10.1364/OE.23.014407).
Abstract
A detailed theoretical study of composite plasmonic waveguide structures is reported. Expressions for modal expansion coefficients, optical transmittance and surface intensity are presented and used to describe the behavior of dielectric channel waveguides containing a short gold-coated section. The superstrate refractive index is shown to control modal beating and modal attenuation in the gold-coated region leading to distinctive features in the surface intensity and device transmittance. The model presented allows detailed prediction of device performance, enabling improved design of highly sensitive miniature devices for evanescent refractometry and vibrational spectroscopy, and can be extended to the design and optimization of composite waveguides structures with nano-patterned overlayers.
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oe-23-11-14407.pdf
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Accepted/In Press date: 16 May 2015
e-pub ahead of print date: 22 May 2015
Published date: 1 June 2015
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 378413
URI: http://eprints.soton.ac.uk/id/eprint/378413
ISSN: 1094-4087
PURE UUID: 2581c954-43df-48bf-a729-d14c50ed15a7
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Date deposited: 29 Jun 2015 14:03
Last modified: 15 Mar 2024 02:42
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Author:
Alina Karabchevsky
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