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Journal of Lightwave Technology

Journal of Lightwave Technology


  • Vol. 27, Iss. 17 — Sep. 1, 2009
  • pp: 3904–3911

Reduction of Propagation Loss in Pillar-Based Photonic Crystal Waveguides

Abigaël A. M. Kok, Jos J. G. M. van der Tol, Roel Baets, and Meint K. Smit

Journal of Lightwave Technology, Vol. 27, Issue 17, pp. 3904-3911 (2009)

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Out-of-plane losses are the major issue in the integration of two-dimensional photonic crystal devices in photonic integrated circuits. In this paper, we show that the out-of-plane losses of pillar-based photonic crystal waveguides can be vastly reduced, even for pillars with a low vertical index contrast, such as in InP/InGaAsP/InP technology. These low losses are obtained by creating confinement between the pillars with a polymer layer stack. We show that the spatial frequency component of the Bloch mode in the first Brillouin zone (i.e., the component inside the light cone), is significantly suppressed by the optimized polymer layer stack.

© 2009 IEEE

Abigaël A. M. Kok, Jos J. G. M. van der Tol, Roel Baets, and Meint K. Smit, "Reduction of Propagation Loss in Pillar-Based Photonic Crystal Waveguides," J. Lightwave Technol. 27, 3904-3911 (2009)

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