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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 29, Iss. 12 — Dec. 1, 2012
  • pp: 2657–2666

Systematic design of loss-engineered slow-light waveguides

Fengwen Wang, Jakob Søndergaard Jensen, Jesper Mørk, and Ole Sigmund  »View Author Affiliations


JOSA A, Vol. 29, Issue 12, pp. 2657-2666 (2012)
http://dx.doi.org/10.1364/JOSAA.29.002657


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Abstract

This paper employs topology optimization to systematically design free-topology loss-engineered slow-light waveguides with enlarged group index bandwidth product (GBP). The propagation losses of guided modes are evaluated by the imaginary part of eigenvalues in complex band structure calculations, where the scattering losses due to manufacturing imperfections are represented by an edge-related effective dissipation. The loss engineering of slow-light waveguides is realized by minimizing the propagation losses of design modes. Numerical examples illustrate that the propagation losses of free-topology dispersion-engineered waveguides can be significantly suppressed by loss engineering. Comparisons between fixed- and free-topology loss-engineered waveguides demonstrate that the GBP can be enhanced significantly by the free-topology loss-engineered waveguides with a small increase of the propagation losses.

© 2012 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(230.7390) Optical devices : Waveguides, planar
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Optical Devices

History
Original Manuscript: July 11, 2012
Manuscript Accepted: September 21, 2012
Published: November 28, 2012

Citation
Fengwen Wang, Jakob Søndergaard Jensen, Jesper Mørk, and Ole Sigmund, "Systematic design of loss-engineered slow-light waveguides," J. Opt. Soc. Am. A 29, 2657-2666 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-12-2657


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