OSA's Digital Library

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)

View Full Text Article

Enhanced HTML    Acrobat PDF (530 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



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

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

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)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. E. Kuramochi, M. Notomi, S. Hughes, A. Shinya, T. Watanabe, and L. Ramunno, "Disorder-induced scattering loss of line-defect waveguides in photonic crystal slabs," Phys. Rev. B. 72, 161318 (2005). [CrossRef]
  2. L. O'Faolain, X. Yuan, D. McIntyre, S. Thoms, H. Chong, R. M. De la Rue, and T. F. Krauss, "Low-loss propagation in photonic crystal waveguides," Electron. Lett. 42,1454-1455 (2006). [CrossRef]
  3. .M. Notomi, T. Tanabe, A. Shinya, E. Kuramochi, H. Taniyama, S. Mitsugi, and M. Morita, "Nonlinear and adiabatic control of high-Q photonic-crystal nanocavities," Opt. Express 15, 17458-17481 (2008). [CrossRef]
  4. M. Settle, M. Salib, A. Michaeli, and T. F. Krauss, "Low loss silicon on insulator photonic crystal waveguides made by 193nm optical lithography," Opt. Express 14, 2440-2445 (2006). [CrossRef] [PubMed]
  5. Y. Tanaka, T. Asano, R. Hatsuta, and S. Noda, "Analysis of a line-defect waveguide on a silicon-on-insulator two-dimensional photonic-crystal slab," J. Lightwave. Technol. 22, 2787-2792 (2004). [CrossRef]
  6. M. Notomi, A. Shinya, S. Mitsugi, E. Kuramochi, and H. Ryu, "Waveguides, resonators and their coupled elements in photonic crystal slabs," Opt. Express 12, 1551-1561 (2004). [CrossRef] [PubMed]
  7. D. Gerace and L. C. Andreani, "Low-loss guided modes in photonic crystal waveguides," Opt. Express 13, 4939-4951 (2005). [CrossRef] [PubMed]
  8. See http://www.nanophotonics.eu.
  9. C-C. Yang and W-C Chen, "The structures and properties of hydrogen silsesquioxane (HSQ) films produced by thermal curing," J. Mater. Chem. 12, 1138-1141 (2002). [CrossRef]
  10. Y. A. Vlasov and S. J. McNab, "Losses in single-mode silicon-on-insulator strip waveguides and bends," Opt. Express 12, 1622-1631 (2004). [CrossRef] [PubMed]
  11. L. C. Andreani and D. Gerace, "Light-matter interaction in photonic crystal slabs," Phys. Status. Solidi B 244, 3528-3539 (2007). [CrossRef]
  12. L. O�??Faolain, T. P. White, D. O�??Brien, X. Yuan, M. D. Settle, and T. F. Krauss, "Dependence of extrinsic loss on group velocity in photonic crystal waveguides," Opt. Express 15, 13129-13138 (2007). [CrossRef] [PubMed]
  13. D. Gerace and L. C. Andreani, "Disorder-induced losses in photonic crystal waveguides with line defects," Opt. Lett. 29, 1897-1899 (2004). [CrossRef] [PubMed]
  14. M. Notomi, A. Shinya, K. Yamada, J. Takahashi, C. Takahashi, and I. Yokahama, "Structural tuning of guiding modes of line-defect waveguides of silicon-on-insulator photonic crystal slabs," IEEE J. Quantum Electron. 38, 736-742 (2000). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited