Absorbing boundary conditions for FDTD simulations of photonic crystal waveguides

We present a novel numerical scheme for the reduction of spurious reflectio ns in simulations of electromagnetic wave propagation in photonic crystal w aveguides. We use a distributed Bragg reflector waveguide termination to re duce reflection from photonic crystal waveguide ends by improving k-matchin g for photonic crystal waveguided modes. We describe computational procedur es and exhibit that a significant reduction in reflection amplitude can be achieved across a large part of the guided mode spectrum. This method enabl es one to reduce simply and effectively the computational requirements in p hotonic crystal waveguide simulations.