Open AccessNanowire-based enhancement of localized surface plasmon resonance for highly sensitive detection: a theoretical study
Author(s) -
Kyujung Kim,
Soon Joon Yoon,
Dong-Hyun Kim
Publication year - 2006
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.012419
Subject(s) - nanowire , surface plasmon resonance , biosensor , materials science , surface plasmon , plasmon , excitation , sensitivity (control systems) , localized surface plasmon , resonance (particle physics) , optoelectronics , surface plasmon polariton , optics , coupling (piping) , finite difference time domain method , nanotechnology , nanoparticle , electronic engineering , physics , quantum mechanics , particle physics , engineering , metallurgy
A nanowire-based localized surface plasmon resonance (LSPR) biosensor has been investigated to evaluate the impact of design parameters of nanowires on the excitation of localized surface plasmons (LSPs) and the sensitivity enhancement of a LSPR biosensor. The results based on rigorous coupled wave analysis and finite difference time domain method indicate that significant sensitivity increase is associated with LSP excitation mediated by nanowires and that resonant coupling of LSPs through a nanogroove achieves larger field enhancement and sensitivity improvement than LSP excitation in a single nanowire. A specific optimization provided a nanowire-based structure with the sensitivity increase by more than 23 times as well as good linear detection properties.