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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 5 — May. 17, 2007

Optical sensing by optimized silicon slot waveguides

Francesco Dell’Olio and Vittorio M. N. Passaro  »View Author Affiliations

Optics Express, Vol. 15, Issue 8, pp. 4977-4993 (2007)

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A theoretical investigation of silicon-on-insulator nanometer slot waveguides for highly sensitive and compact chemical and biochemical integrated optical sensing is proposed. Slot guiding structures enabling high optical confinement in a low-index very small region are demonstrated to be very sensitive to either cover medium refractive index change or deposited receptor layer thickness increase. Modal and confinement properties of slot waveguides have been investigated, considering also the influence of fabrication tolerances. Waveguide sensitivity has been calculated and compared with that exhibited by other silicon nanometer guiding structures, such as rib or wire waveguides, or with experimental values in literature.

© 2007 Optical Society of America

OCIS Codes
(040.6040) Detectors : Silicon
(130.0130) Integrated optics : Integrated optics
(130.3120) Integrated optics : Integrated optics devices
(130.6010) Integrated optics : Sensors

ToC Category:
Integrated Optics

Original Manuscript: March 13, 2007
Revised Manuscript: March 23, 2007
Manuscript Accepted: March 23, 2007
Published: April 9, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

Francesco Dell'Olio and Vittorio M. Passaro, "Optical sensing by optimized silicon slot waveguides," Opt. Express 15, 4977-4993 (2007)

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