High reflectivity gratings on silicon-on-insulator waveguide facets

doi:10.1364/OE.16.016481

High reflectivity gratings on silicon-on-insulator waveguide facets

J. H. Schmid, P. Cheben, J. Lapointe, S. Janz, A. Delâge, A. Densmore, and D.-X. Xu »View Author Affiliations

Optics Express, Vol. 16, Issue 21, pp. 16481-16488 (2008)
http://dx.doi.org/10.1364/OE.16.016481

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Abstract

We demonstrate by numerical simulations and experiments that highly reflective (HR) facets can be formed on silicon waveguides with high reflectivity diffraction gratings. We use an HR grating with a plane wave reflectivity exceeding 99.99%, as calculated by rigorous coupled wave analysis. Experimentally, we demonstrate the HR effect for silicon-on-insulator waveguide facets patterned lithographically with grating structures. Due to a strong mode size dependence, the maximum facet reflectivity for 1.5 µm thick waveguide is 77%, but finite difference time-domain simulations show that modal reflectivies larger than 90% can be achieved for silicon waveguides with thicknesses of 4 µm or more.

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(130.2790) Integrated optics : Guided waves
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 15, 2008
Revised Manuscript: September 22, 2008
Manuscript Accepted: September 23, 2008
Published: October 1, 2008

Citation
J. H. Schmid, P. Cheben, J. Lapointe, S. Janz, A. Delâge, A. Densmore, and D.-X. Xu, "High reflectivity gratings on silicon-on-insulator waveguide facets," Opt. Express 16, 16481-16488 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-21-16481

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References

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