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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 17 — Jun. 10, 2006
  • pp: 4114–4121

Analysis of photonic crystal waveguide gratings with coupled-mode theory and a finite-element method

Takeshi Fujisawa and Masanori Koshiba  »View Author Affiliations


Applied Optics, Vol. 45, Issue 17, pp. 4114-4121 (2006)
http://dx.doi.org/10.1364/AO.45.004114


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Abstract

Both rod and air-hole types of photonic crystal waveguide gratings are proposed and their coupling coefficients and transmission characteristics are effectively investigated by using a simple coupled-mode theory combined with a finite-element method. The results obtained are compared with the results obtained by using a full numerical simulation method. A new definition for unperturbed waveguides is introduced to obtain accurate coupling coefficients. It is shown that, by using a π-phase-shifted waveguide structure in the case of an air-hole type of photonic crystal waveguide grating, the coupling coefficient is strongly enhanced. The accuracy of the method is discussed through numerical examples of high-index-contrast waveguide gratings.

© 2006 Optical Society of America

OCIS Codes
(230.1480) Optical devices : Bragg reflectors
(230.3990) Optical devices : Micro-optical devices

History
Original Manuscript: September 30, 2005
Revised Manuscript: January 12, 2006
Manuscript Accepted: January 15, 2006

Citation
Takeshi Fujisawa and Masanori Koshiba, "Analysis of photonic crystal waveguide gratings with coupled-mode theory and a finite-element method," Appl. Opt. 45, 4114-4121 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-17-4114

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