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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 32, Iss. 13 — Jul. 1, 2007
  • pp: 1902–1904

Experimental study of sensitivity enhancement in surface plasmon resonance biosensors by use of periodic metallic nanowires

Kyung Min Byun, Soon Joon Yoon, Donghyun Kim, and Sung June Kim  »View Author Affiliations

Optics Letters, Vol. 32, Issue 13, pp. 1902-1904 (2007)

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We have experimentally confirmed sensitivity enhancement of a nanowire-based surface plasmon resonance (SPR) sensor structure. Gold nanowires with periods of 200 and 500 nm were fabricated, respectively, by electron-beam and interference lithography on a gold/SF10 substrate. Sensitivity enhancement was measured to be 44% compared with a conventional thin-film-based SPR structure for nanowires of 200 nm period and 31% for 500 nm when evaluated using ethanol at a varied concentration. This result is consistent with numerical data. Surface roughness is responsible for sensitivity reduction by more than 10%. More significant sensitivity improvement can be achieved by inducing strong localized plasmon coupling with finer nanowires.

© 2007 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: January 8, 2007
Revised Manuscript: April 9, 2007
Manuscript Accepted: May 9, 2007
Published: June 22, 2007

Virtual Issues
Vol. 2, Iss. 8 Virtual Journal for Biomedical Optics

Kyung Min Byun, Soon Joon Yoon, Donghyun Kim, and Sung June Kim, "Experimental study of sensitivity enhancement in surface plasmon resonance biosensors by use of periodic metallic nanowires," Opt. Lett. 32, 1902-1904 (2007)

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