Direct numerical and experimental determination of the group index in photonic crystal waveguides

Andrei V. Lavrinenko; Rune S. Jacobsen; Jacob Fage-Pedersen; Beata Zsigri; Christophe Peucheret; Lars H. Frandsen; Martin Kristensen; Peter I. Borel

doi:10.1117/12.622183

12 October 2005 Direct numerical and experimental determination of the group index in photonic crystal waveguides

Andrei V. Lavrinenko, Rune S. Jacobsen, Jacob Fage-Pedersen, Beata Zsigri, Christophe Peucheret, Lars H. Frandsen, Martin Kristensen, Peter I. Borel

Author Affiliations +

Proceedings Volume 5950, Photonic Crystals and Fibers; 59500F (2005) https://doi.org/10.1117/12.622183
Event: Congress on Optics and Optoelectronics, 2005, Warsaw, Poland

Abstract

We report on direct numerical calculations and experimental measurements of the group-index dispersion in a photonic crystal waveguide fabricated in silicon-on-insulator material. The photonic crystal is defined by a triangular arrangement of holes and the waveguide is carved out by introducing a one-row line defect. Both the numerical and experimental methods are based on the time of flight approach for an optical pulse. An increase of the group index by approximately 45 times (from 4 to 155) has been observed when approaching the cutoff of the fundamental photonic bandgap mode. Numerical 2D and 3D simulations of pulse dynamics in the waveguide made by the time-domain method shows excellent agreement with measured data in most of the band. These group index values in a photonic crystal waveguide are to the best of our knowledge the largest numbers reported so far by direct tracking of pulse propagation.

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Andrei V. Lavrinenko, Rune S. Jacobsen, Jacob Fage-Pedersen, Beata Zsigri, Christophe Peucheret, Lars H. Frandsen, Martin Kristensen, and Peter I. Borel "Direct numerical and experimental determination of the group index in photonic crystal waveguides", Proc. SPIE 5950, Photonic Crystals and Fibers, 59500F (12 October 2005); https://doi.org/10.1117/12.622183

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