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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 25 — Dec. 11, 2006
  • pp: 12419–12431

Nanowire-based enhancement of localized surface plasmon resonance for highly sensitive detection: a theoretical study

Kyujung Kim, Soon Joon Yoon, and Donghyun Kim  »View Author Affiliations

Optics Express, Vol. 14, Issue 25, pp. 12419-12431 (2006)

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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 sensitivity increase by more than 23 times as well as good linear detection properties.

© 2006 Optical Society of America

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(130.6010) Integrated optics : Sensors
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: August 14, 2006
Revised Manuscript: October 30, 2006
Manuscript Accepted: November 28, 2006
Published: December 11, 2006

Virtual Issues
Vol. 2, Iss. 1 Virtual Journal for Biomedical Optics

Kyujung Kim, Soon J. Yoon, and Donghyun Kim, "Nanowire-based enhancement of localized surface plasmon resonance for highly sensitive detection: a theoretical study," Opt. Express 14, 12419-12431 (2006)

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