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Experimental Study of Sensitivity Enhancement in Surface Plasmon Resonance Biosensors by Use of Periodic Metallic Nanowires

Cited 118 time in Web of Science Cited 121 time in Scopus
Authors
Byun, Kyung Min; Yoon, Soon Joon; Kim, Donghyun; Kim, Sung June
Issue Date
2007-07
Publisher
Optical Society of America
Citation
Opt. Lett. 32, 1902 (2007)
Abstract
We have experimentally confirmed sensitivity enhancement of a nanowire-based surface plasmon resonance
(SPR) sensor structure. Gold nanowires with periods of 200 and 500 nm were fabricated, respectively, by
electron-beam and interference lithography on a gold/SF10 substrate. Sensitivity enhancement was measured
to be 44% compared with a conventional thin-film-based SPR structure for nanowires of 200 nm period
and 31% for 500 nm when evaluated using ethanol at a varied concentration. This result is consistent with
numerical data. Surface roughness is responsible for sensitivity reduction by more than 10%. More significant
sensitivity improvement can be achieved by inducing strong localized plasmon coupling with finer
nanowires
ISSN
0146-9592
Language
English
URI
http://hdl.handle.net/10371/7927
DOI
https://doi.org/10.1364/OL.32.001902
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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