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Experimental Study of Sensitivity Enhancement in Surface Plasmon Resonance Biosensors by Use of Periodic Metallic Nanowires
Cited 123 time in
Web of Science
Cited 127 time in Scopus
- Authors
- 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
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