AUGMENTED-PLANE-WAVE METHOD FOR PHOTONIC BAND-GAP MATERIALS

We present a numerical method for computing the eigenstates of a photo nic band-gap material based on the augmented plane-wave method. The me thod uses a functional basis set well suited for structures with spher ical and cylindrical elements, and allows for fast numerical convergen ce with a small number of expansion terms. In addition, the method has the ability of dealing with both metallic and dielectric elements wit hout special treatment. The method is applied to an array of long para llel rods with circular cross section. [S0163-1829(98)02516-8].