The three-dimensional finite-difference time-domain method is used to obtain loss per unit length in a two-dimensional photonic crystal membrane waveguide by simulating three different length guides. Results are shown for propagation both above and below the light line. The results are compared with a Fourier expansion method and good agreement is obtained above and below the light line
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- photonic crystals (PCs), Finite-difference time-domain (FDTD), two-dimensional photonic crystal waveguides (2-D PC-WGs)