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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: Stephen A. Burns
  • Vol. 25, Iss. 3 — Mar. 1, 2008
  • pp: 791–795

Self-collimated waveguide bends and partial bandgap reflection of photonic crystals with parallelogram lattice

Dingshan Gao, Zhiping Zhou, and David S. Citrin  »View Author Affiliations


JOSA A, Vol. 25, Issue 3, pp. 791-795 (2008)
http://dx.doi.org/10.1364/JOSAA.25.000791


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Abstract

The photonic crystal structure with parallelogram lattice, capable of bending a self-collimated wave with free angles and partial bandgap reflection, is presented. The equifrequency contours show that the direction of the collimation wave can be turned by tuning the angle between the two basic vectors of the lattice. Acute, right, and obtuse angles of collimating waveguide bends have been realized by arc lattices of parallelogram photonic crystals. Moreover, partial bandgap reflection of the parallelogram lattice photonic crystals is validated from the equifrequency contours and the projected band structures. A waveguide taper based on this partial bandgap reflection is also designed and proved to have above 85% transmittance over a very wide operating bandwidth of 180 nm .

© 2008 Optical Society of America

OCIS Codes
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: October 22, 2007
Manuscript Accepted: January 22, 2008
Published: February 25, 2008

Citation
Dingshan Gao, Zhiping Zhou, and David S. Citrin, "Self-collimated waveguide bends and partial bandgap reflection of photonic crystals with parallelogram lattice," J. Opt. Soc. Am. A 25, 791-795 (2008)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-25-3-791

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