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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 10, Iss. 23 — Nov. 18, 2002
  • pp: 1320–1333

Analysis of spectral characteristics of photonic bandgap waveguides

A. K. Abeeluck, N. M. Litchinitser, C. Headley, and B. J. Eggleton  »View Author Affiliations

Optics Express, Vol. 10, Issue 23, pp. 1320-1333 (2002)

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A numerical model based on a scalar beam propagation method is applied to study light transmission in photonic bandgap (PBG) waveguides. The similarity between a cylindrical waveguide with concentric layers of different indices and an analogous planar waveguide is demonstrated by comparing their transmission spectra that are numerically shown to have coinciding wavelengths for their respective transmission maxima and minima. Furthermore, the numerical model indicates the existence of two regimes of light propagation depending on the wavelength. Bragg scattering off the multiple high-index/low-index layers of the cladding determines the transmission spectrum for long wavelengths. As the wavelength decreases, the spectral features are found to be almost independent of the pitch of the multi-layer Bragg mirror stack. An analytical model based on an antiresonant reflecting guidance mechanism is developed to accurately predict the location of the transmission minima and maxima observed in the simulations when the wavelength of the launched light is short. Mode computations also show that the optical field is concentrated mostly in the core and the surrounding first high-index layers in the short-wavelength regime while the field extends well into the outermost layers of the Bragg structure for longer wavelengths. A simple physical model of the reflectivity at the core/high-index layer interface is used to intuitively understand some aspects of the numerical results as the transmission spectrum transitions from the short- to the long-wavelength regime.

© 2002 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(230.1480) Optical devices : Bragg reflectors
(230.3990) Optical devices : Micro-optical devices
(230.7370) Optical devices : Waveguides

ToC Category:
Research Papers

Original Manuscript: October 14, 2002
Revised Manuscript: October 31, 2002
Published: November 18, 2002

Akheelesh Abeeluck, N. Litchinitser, C. Headley, and B. Eggleton, "Analysis of spectral characteristics of photonic bandgap waveguides," Opt. Express 10, 1320-1333 (2002)

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