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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 13 — Jun. 27, 2005
  • pp: 4939–4951

Low-loss guided modes in photonic crystal waveguides

Dario Gerace and Lucio Andreani  »View Author Affiliations


Optics Express, Vol. 13, Issue 13, pp. 4939-4951 (2005)
http://dx.doi.org/10.1364/OPEX.13.004939


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Abstract

We study disorder-induced propagation losses of guided modes in photonic crystal slabs with line-defects. These losses are treated within a theoretical model of size disorder for the etched holes in the otherwise periodic photonic lattice. Comparisons are provided with state-of-the-art experimental data, both in membrane and Silicon-on-Insulator (SOI) structures, in which propagation losses are mainly attributed to fabrication imperfections. The dependence of the losses on the photon group velocity and the useful bandwidth for low-loss propagation are analyzed and discussed for membrane and asymmetric as well as symmetric SOI systems. New designs for further improving device performances are proposed, which employ waveguides with varying channel widths. It is shown that losses in photonic crystal waveguides could be reduced by almost an order of magnitude with respect to latest experimental results. Propagation losses lower than 0.1 dB/mm are predicted for suitably designed structures, by assuming state-of-the-art fabrication accuracy.

© 2005 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Research Papers

History
Original Manuscript: May 10, 2005
Revised Manuscript: June 10, 2005
Published: June 27, 2005

Citation
Dario Gerace and Lucio Andreani, "Low-loss guided modes in photonic crystal waveguides," Opt. Express 13, 4939-4951 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-13-4939


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