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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 5 — Mar. 5, 2007
  • pp: 2592–2597

High sensitivity sensors made of perforated waveguides

Koichi Awazu, Carsten Rockstuhl, Makoto Fujimaki, Nobuko Fukuda, Junji Tominaga, Tetsuro Komatsubara, Takahiro Ikeda, and Yoshimichi Ohki  »View Author Affiliations


Optics Express, Vol. 15, Issue 5, pp. 2592-2597 (2007)
http://dx.doi.org/10.1364/OE.15.002592


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Abstract

Sensors based on surface plasmons or waveguide modes are at the focus of interest for applications in biological or environmental chemistry. Waveguide-mode spectra of 1 μm-thick pure and perforated silica films comprising isolated nanometric holes with great aspect ratio were measured before and after adhesion of streptavidin at concentrations of 500 nM. The shift of the angular position for guided modes was nine times higher in perforated films than in bulk films. Capturing of streptavidin in the nanoholes is at the origin of that largely enhanced shift in the angular position as the amplitude of the guided mode in the waveguide perfectly overlaps with the perturbation caused by the molecules. Hence, the device allows for strongly confined modes and their strong perturbation to enable ultra-sensitive sensor applications.

© 2007 Optical Society of America

OCIS Codes
(160.6030) Materials : Silica
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(260.3910) Physical optics : Metal optics
(310.2790) Thin films : Guided waves

ToC Category:
Optics at Surfaces

History
Original Manuscript: November 17, 2006
Revised Manuscript: January 12, 2007
Manuscript Accepted: January 21, 2007
Published: March 5, 2007

Virtual Issues
Vol. 2, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Koichi Awazu, Carsten Rockstuhl, Makoto Fujimaki, Nobuko Fukuda, Junji Tominaga, Tetsuro Komatsubara, Takahiro Ikeda, and Yoshimichi Ohki, "High sensitivity sensors made of perforated waveguides," Opt. Express 15, 2592-2597 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-5-2592


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