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Effect of metallic nanowires on the sensitivity enhancement of surface plasmon resonance biosensors

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Authors
Byun, Kyung Min; Yoon, Soon Joon; Kim, Donghyun; Kim, Sung June
Issue Date
2007-01-20
Publisher
International Society for Optical Engineering (SPIE)
Citation
SPIE Photonics West, San Jose, California USA, 20-25 January 2007
Keywords
Surface plasmon resonancebiosensorsmetallic nanowiressensitivity enhancement
Abstract
In this study, we experimentally confirmed the sensitivity enhancement by the nanowire-based surface plasmon resonance (SPR) sensor structure. Gold nanowire samples with a period of 500 nm were fabricated by interference lithography on a gold-SF10 glass substrate. Sensitivity enhancement compared to a conventional SPR structure was measured to be 31% when evaluated using a varied concentration of ethanol at a dielectric surrounding layer. This result is consistent with numerical data of rigorous coupled-wave analysis. Rough surfaces of thin gold film and gold nanowires are deemed to induce the sensitivity degradation by more than 10%. More significant sensitivity improvement can be achieved by implementing finer nanowires.
Language
English
URI
http://hdl.handle.net/10371/7725
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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