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Title: Physical characteristics of localized surface plasmons resulting from nano-scale structured multi-layer thin films deposited on D-shaped optical fiber
Authors: Allsop, Thomas P. 
Neal, Ron M. 
Dvorak, Martin 
Kalli, Kyriacos 
Rozhin, A. G. 
Webb, David J. 
Keywords: Resonance biosensors;Sensitivity;Light;Gold
Category: Electrical Engineering - Electronic Engineering - Information Engineering
Field: Engineering and Technology
Issue Date: 12-Aug-2013
Publisher: The Optical Society
Source: Optics Express, 2013, vol. 21, no. 16, pp. 18765-18776
DOI: 10.1364/OE.21.018765
Journal: Optics Express 
Abstract: 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.
ISSN: 1094-4087
DOI: 10.1364/OE.21.018765
Rights: © 2013 Optical Society of America.
Type: Article
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