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Opt Express. 2005 Oct 3;13(20):7861-71.

Direct experimental and numerical determination of extremely high group indices in photonic crystal waveguides.


We report on time-of-flight experimental measurements and numerical calculations of the group-index dispersion in a photonic crystal waveguide realized in silicon-on-insulator material. Experimentally group indices higher than 230 has been observed. Numerical 2D and 3D time-domain simulations show excellent agreement with the measured data.

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