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Investigation of metallic nanowire-based localized surface plasmon resonance optical biosensors using extinction spectra

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Authors
Byun, Kyung Min; Kim, Sung June; Kim, Donghyun
Issue Date
2006-01-24
Publisher
International Society for Optical Engineering (SPIE)
Citation
SPIE Internarional Symposium BiOS 2006, San Jose, California USA, 21-26 January 2006
Keywords
Localized surface plasmon resonancebiosensorsnanowiresrigorous coupled wave analysis
Abstract
In this study, we investigate the impact of the cross sectional profile of an array of metallic nanowires on the feasibility
of a localized surface plasmons resonance (LSPR) biosensor. Calculations were performed using rigorous coupled wave
analysis with an emphasis on the extinction properties of the LSPR structure. It was confirmed that the resonance
spectrum strongly depends on the nanowire period and profile. Our numerical results indicate that the nanowire structure,
particularly that of a T-profile, delivers extremely linear sensing performance over a wide range of target refractive index
with much enhanced sensitivity. The extinction-based LSPR structure also involves relatively large dimension and thus
is expected to provide a feasible biosensor using current semiconductor technology.
Language
English
URI
http://hdl.handle.net/10371/7717
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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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