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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 8 — Apr. 11, 2011
  • pp: 7790–7798

Label-free biosensing with high sensitivity in dual-core microstructured polymer optical fibers

Christos Markos, Wu Yuan, Kyriakos Vlachos, Graham E. Town, and Ole Bang  »View Author Affiliations

Optics Express, Vol. 19, Issue 8, pp. 7790-7798 (2011)

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We present experimentally feasible designs of a dual-core microstructured polymer optical fiber (mPOF), which can act as a highly sensitive, label-free, and selective biosensor. An immobilized antigen sensing layer on the walls of the holes in the mPOF provides the ability to selectively capture antibody biomolecules. The change of the layer thickness of biomolecules can then be detected as a change in the coupling length between the two cores. We compare mPOF structures with 1, 2, and 3 air-holes between the solid cores and show that the sensitivity increases with increasing distance between the cores. Numerical calculations indicate a record sensitivity up to 20 nm/nm (defined as the shift in the resonance wavelength per nm biolayer) at visible wavelengths, where the mPOF has low loss.

© 2011 OSA

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(060.4005) Fiber optics and optical communications : Microstructured fibers
(130.5460) Integrated optics : Polymer waveguides

ToC Category:

Original Manuscript: January 20, 2011
Revised Manuscript: March 29, 2011
Manuscript Accepted: March 31, 2011
Published: April 7, 2011

Virtual Issues
Vol. 6, Iss. 5 Virtual Journal for Biomedical Optics

Christos Markos, Wu Yuan, Kyriakos Vlachos, Graham E. Town, and Ole Bang, "Label-free biosensing with high sensitivity in dual-core microstructured polymer optical fibers," Opt. Express 19, 7790-7798 (2011)

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