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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 19 — Sep. 13, 2010
  • pp: 20518–20528

Composite superprism photonic crystal demultiplexer: analysis and design

Amin Khorshidahmad and Andrew G. Kirk  »View Author Affiliations

Optics Express, Vol. 18, Issue 19, pp. 20518-20528 (2010)

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We present the analysis and design of a superprism-based demultiplexer that employs both group and phase velocity dispersion of the photonic crystal (PhC). Simultaneous diffraction compensation and spatio-angular wavelength channel separation is realized in a slab region that divides the PhC. This avoids the excessive broadening of the beams inside the PhC and enhances the achievable angular dispersion of the conventional superprism topology. As a result, a compact demultiplexer with a relaxed requirement for low divergence input beams is attained. The dynamics of the beams envelops are considered based on the curvature of the band structure. Analysis shows at least 36-fold reduction of the PhC area and much smaller propagation length in slab compared to the preconditioned superprism, based on the same design model. PhC area scales as Δω-2.5 with Δω being the channel spacing.

© 2010 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

Original Manuscript: August 6, 2010
Revised Manuscript: September 3, 2010
Manuscript Accepted: September 3, 2010
Published: September 10, 2010

Amin Khorshidahmad and Andrew G. Kirk, "Composite superprism photonic crystal demultiplexer: analysis and design," Opt. Express 18, 20518-20528 (2010)

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