Abstract
The optical response of a thick slab of a two-dimensional photonic crystal, obtained by taking a rectangular dielectric grating as the elementary building block, is computed and compared with the dispersion curve of the bulk. The role of the bulk and the surface waves of the system on the optical transmittivity is discussed. The “mirror effect”, computed by two of the present authors in self-sustained rectangular dielectric gratings, due to the interplay among traveling, evanescent and guided waves, is recovered and it seems to endure also in the semi-infinite photonic crystal.
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