TY - GEN
T1 - Performance analysis of extinction-based localized surface plasmon resonance biosensors in the presence of surface roughness
AU - Byun, Kyung Min
AU - Yoon, Soon Joon
AU - Kim, Donghyun
PY - 2009
Y1 - 2009
N2 - We investigated the effect of rough surface on the performance of extinction-based localized surface plasmon resonance (LSPR) biosensors. The sensor measures resonance wavelength shifts in transmittance due to biomolecular interactions amplified by periodic nanostructures. The numerical calculation was conducted using rigorous coupled-wave analysis with Gaussian random profiles. The results suggest that, when a surface has a roughness smaller than 2 nm, the sensitivity of an LSPR biosensor is not significantly affected regardless of correlation length (CL). However, we found that extinction peak amplitude and curve width are affected substantially with a decrease in CL. At CL less than 100 nm, surface roughness may induce interference between localized surface plasmons excited by the surface and nanowires, which can lead to significant degradation of sensor performance.
AB - We investigated the effect of rough surface on the performance of extinction-based localized surface plasmon resonance (LSPR) biosensors. The sensor measures resonance wavelength shifts in transmittance due to biomolecular interactions amplified by periodic nanostructures. The numerical calculation was conducted using rigorous coupled-wave analysis with Gaussian random profiles. The results suggest that, when a surface has a roughness smaller than 2 nm, the sensitivity of an LSPR biosensor is not significantly affected regardless of correlation length (CL). However, we found that extinction peak amplitude and curve width are affected substantially with a decrease in CL. At CL less than 100 nm, surface roughness may induce interference between localized surface plasmons excited by the surface and nanowires, which can lead to significant degradation of sensor performance.
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U2 - 10.1117/12.808597
DO - 10.1117/12.808597
M3 - Conference contribution
AN - SCOPUS:66649136119
SN - 9780819474384
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Plasmonics in Biology and Medicine VI
T2 - Plasmonics in Biology and Medicine VI
Y2 - 26 January 2009 through 27 January 2009
ER -