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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 33 — Nov. 20, 2013
  • pp: 8089–8094

Enhanced sensitivity in polymer slot waveguides by atomic layer deposited bilayer coatings

Leila Ahmadi, Jani Tervo, Jyrki Saarinen, and Seppo Honkanen  »View Author Affiliations

Applied Optics, Vol. 52, Issue 33, pp. 8089-8094 (2013)

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The refractive index sensitivity of a polymer slot waveguide coated with a bilayer of Al2O3/TiO2 was investigated theoretically and optimized for biosensor applications. The influence of atomic-layer-deposition-coated thin high-refractive-index layers on the slot confinement factor and the homogeneous sensitivity of polymer slot waveguides with different geometries were simulated. The results were compared with those of an optimized noncoated polymer slot waveguide, both operating at visible wavelengths. The simulations reveal that the proposed structure offers a significant improvement in the confinement factor and the sensitivity. These calculations present guidelines for the design and fabrication of relatively sensitive polymer slot waveguide devices for low-cost biochemical sensor applications.

© 2013 Optical Society of America

OCIS Codes
(230.3120) Optical devices : Integrated optics devices
(230.7370) Optical devices : Waveguides
(250.5460) Optoelectronics : Polymer waveguides
(310.1860) Thin films : Deposition and fabrication

ToC Category:

Original Manuscript: July 29, 2013
Revised Manuscript: October 14, 2013
Manuscript Accepted: October 21, 2013
Published: November 18, 2013

Leila Ahmadi, Jani Tervo, Jyrki Saarinen, and Seppo Honkanen, "Enhanced sensitivity in polymer slot waveguides by atomic layer deposited bilayer coatings," Appl. Opt. 52, 8089-8094 (2013)

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