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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 15 — Jul. 19, 2010
  • pp: 16162–16174

3D integration of photonic crystal devices: vertical coupling with a silicon waveguide

L. Ferrier, P. Rojo Romeo, X. Letartre, E. Drouard, and P. Viktorovitch  »View Author Affiliations

Optics Express, Vol. 18, Issue 15, pp. 16162-16174 (2010)

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Two integrated devices based on the vertical coupling between a photonic crystal microcavity and a silicon (Si) ridge waveguide are presented in this paper. When the resonator is coupled to a single waveguide, light can be spectrally extracted from the waveguide to free space through the far field emission of the resonator. When the resonator is vertically coupled to two waveguides, a vertical add-drop filter can be realized. The dropping efficiency of these devices relies on a careful design of the resonator. In this paper, we use a Fabry-Perot (FP) microcavity composed of two photonic crystal (PhC) slab mirrors. Thanks to the unique dispersion properties of slow Bloch modes (SBM) at the flat extreme of the dispersion curve, it is possible to design a FP cavity exhibiting two quasi-degenerate modes. This specific configuration allows for a coupling efficiency that can theoretically achieve 100%. Using 3D FDTD calculations, we discuss the design of such devices and show that high dropping efficiency can be achieved between the Si waveguides and the PhC microcavity.

© 2010 OSA

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(230.5750) Optical devices : Resonators
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

Original Manuscript: May 10, 2010
Revised Manuscript: June 23, 2010
Manuscript Accepted: June 28, 2010
Published: July 15, 2010

L. Ferrier, P. Rojo Romeo, X. Letartre, E. Drouard, and P. Viktorovitch, "3D integration of photonic crystal devices: vertical coupling with a silicon waveguide," Opt. Express 18, 16162-16174 (2010)

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