Physical characteristics of localized surface plasmons resulting from nano-scale structured multi-layer thin films deposited on D-shaped optical fiber


Novel surface plasmonic optical fiber sensors have been fabricated using multiple coatings deposited on a lapped section of a single mode fiber. UV laser irradiation processing with a phase mask produces a nano-scaled surface relief grating structure resembling nano-wires. The resulting individual corrugations produced by material compaction are approximately 20 μm long with an average width at half maximum of 100 nm and generate localized surface plasmons. Experimental data are presented that show changes in the spectral characteristics after UV processing, coupled with an overall increase in the sensitivity of the devices to surrounding refractive index. Evidence is presented that there is an optimum UV dosage (48 joules) over which no significant additional optical change is observed. The devices are characterized with regards to change in refractive index, where significantly high spectral sensitivities in the aqueous index regime are found, ranging up to 4000 nm/RIU for wavelength and 800 dB/RIU for intensity.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © 2013 OSA This paper was published in Optics express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. Funding: EPSRC Joint Research Grant [EP/J010413/1]; European Regional Development Fund [CEITEC-CZ.1.05/1.1.00/02.0068]; EU 7th Framework Programme [280566 - UnivSEM]
Publication ISSN: 1094-4087
Last Modified: 18 Jan 2024 08:06
Date Deposited: 02 Jul 2014 10:50
Full Text Link: http://www.opti ... =oe-21-16-18765
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2013-08-12
Published Online Date: 2013-07-31
Authors: Allsop, Thomas D.P. (ORCID Profile 0000-0001-8905-9014)
Neal, Ron
Dvorak, Martin
Kalli, Kyriacos
Rozhin, Alex (ORCID Profile 0000-0003-2271-8227)
Webb, David J. (ORCID Profile 0000-0002-5495-1296)



Version: Published Version

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