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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 17076–17081

Silica-embedded silicon photonic crystal waveguides

T. P. White, L. O’Faolain, Juntao Li, L. C. Andreani, and T. F. Krauss  »View Author Affiliations


Optics Express, Vol. 16, Issue 21, pp. 17076-17081 (2008)
http://dx.doi.org/10.1364/OE.16.017076


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Abstract

We report on the fabrication and characterization of silicon photonic crystal waveguides completely embedded in silica. These waveguides offer a robust alternative to air-membranes and are fully compatible with monolithic integration. Despite the reduced refractive index contrast compared to the air-membranes, these waveguides offer a considerable operating range of ≈10 nm in the 1550 nm window. While the reduced index contrast weakens the perturbations due to surface roughness, we measure losses of 35±3dB/cm compared to 12±3 dB/cm for nominally identical air-membranes. Numerical analysis reveals that the difference in loss results from the different mode distribution and group index of the respective waveguide modes. Radius disorder is used as a fitting parameter in the numerical simulations with the best fits found for disorder levels of 1.4–1.7 nm RMS, which attest to the high quality of our structures.

© 2008 Optical Society of America

OCIS Codes
(230.3120) Optical devices : Integrated optics devices
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Photonic Crystals

History
Original Manuscript: September 5, 2008
Revised Manuscript: October 8, 2008
Manuscript Accepted: October 8, 2008
Published: October 10, 2008

Citation
T. P. White, L. O'Faolain, Juntao Li, L. C. Andreani, and T. F. Krauss, "Silica-embedded silicon photonic crystal waveguides," Opt. Express 16, 17076-17081 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-21-17076


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References

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