Extraction of group index of lossy photonic crystal waveguides

This work is supported by an EPSRC Impact Acceleration Grant, an EPSRC Doctoral Prize and a European Research Council Starting grant (no. 337508).We present a numerical approach to extract group index in photonic crystal (PhC) waveguides using two- and three-dimensional finite-difference time-domain methods and make a quantitative study of the effects of loss on slow light propagation in PhC waveguides. PhC waveguides are simulated with varying material loss and varying PhC waveguide length. Finally, we validate our method by comparing three-dimensional simulation results with experimental results.Peer reviewe