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Impact of surface roughness on the sensitivity enhancement of a nanowire-based surface plasmon resonance biosensor

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dc.contributor.authorByun, Kyung Min-
dc.contributor.authorYoon, Soon Joon-
dc.contributor.authorKim, Donghyun-
dc.contributor.authorKim, Sung June-
dc.date.accessioned2009-08-25T05:05:08Z-
dc.date.available2009-08-25T05:05:08Z-
dc.date.issued2007-01-20-
dc.identifier.citationSPIE Photonics West, San Jose, California USA, 20-25 January 2007en
dc.identifier.urihttps://hdl.handle.net/10371/7727-
dc.description.abstractIn this study, we investigated the impact of surface roughness on the sensitivity of conventional and nanowire-based surface plasmon resonance (SPR) biosensors. The theoretical research was conducted using rigorous coupled-wave analysis with Gaussian surface profiles of gold films determined by atomic force microscopy. The results suggest that, when surface roughness ranges 1 nm, the sensitivity of a conventional SPR system is not significantly affected regardless of the correlation length. For a nanowire-based SPR biosensor, however, we found that the sensitivity degrades substantially with a decreasing correlation length. Particularly, at a correlation length smaller than 100 nm, random rough surface may induce destructive coupling between excited localized surface plasmons, which can lead to prominent reduction of sensitivity enhancement.en
dc.description.sponsorshipThis work was supported by the SRC/ERC program of MOST/KOSEF (R11-2000-075-01001-1) and by Nano Artificial Vision Research Center supported by Korea Health 21 R&D Project (MOHW Grant No.A050251). D. Kim acknowledges the support by KOSEF through National Core Research Center for Nanomedical Technology (R15-2004-024-00000-0).en
dc.language.isoen-
dc.publisherInternational Society for Optical Engineering (SPIE)en
dc.subjectLocalized surface plasmon resonanceen
dc.subjectbiosensorsen
dc.subjectmetallic nanowiresen
dc.subjectsurface roughnessen
dc.subjectsensitivity enhancementen
dc.titleImpact of surface roughness on the sensitivity enhancement of a nanowire-based surface plasmon resonance biosensoren
dc.typeConference Paperen
dc.contributor.AlternativeAuthor변경민-
dc.contributor.AlternativeAuthor윤순준-
dc.contributor.AlternativeAuthor김동현-
dc.contributor.AlternativeAuthor김성준-
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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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