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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 27 — Sep. 20, 2009
  • pp: 5050–5054

Small-hole waveguides in silicon photonic crystal slabs: efficient use of the complete photonic bandgap

Christian Bayer and Martin Straub  »View Author Affiliations

Applied Optics, Vol. 48, Issue 27, pp. 5050-5054 (2009)

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We investigate photonic crystal waveguides that are formed by holes of reduced diameter within a hexagonal lattice of cylindrical airholes in thin freestanding silicon slabs. The waveguides operate in both an even-symmetry bandgap and a partial gap of odd-symmetry modes that form a complete two-dimensional bandgap under the light line. The operating frequency is tuned by the small-hole diameter to fit within the range of both bandgaps and to match a free-space wavelength of 1550 nm . Their narrow bandwidth and low group velocity of light propagation renders the waveguides useful as filters or sensing elements. Because of the strong dependence of the waveguide mode characteristics on structural changes, the highest-precision lithographic fabrication techniques must be applied.

© 2009 Optical Society of America

OCIS Codes
(230.7400) Optical devices : Waveguides, slab
(160.5293) Materials : Photonic bandgap materials
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

Original Manuscript: April 30, 2009
Revised Manuscript: August 25, 2009
Manuscript Accepted: August 25, 2009
Published: September 10, 2009

Christian Bayer and Martin Straub, "Small-hole waveguides in silicon photonic crystal slabs: efficient use of the complete photonic bandgap," Appl. Opt. 48, 5050-5054 (2009)

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