Analysis of photonic band structure of 2-D metallic-dielectric photonic crystals suitable for various applications in optical communications

We numerically analyzed the photonic band structure of 2-d metallic-dielectric photonic crystal structures which consist of square arrays with circular metal rods. we calculated dispersion curves of square lattice with metal rods which are embedded into background materials with different dielectric constants for tm and te modes and changed the ratio of the rods’ radius to the lattice constant (r/a).we also investigated the effect of changing metal rods on the photonic band structures in two steps. in the first step, we changed background materials with fixed r/a constant and then we fixed both ther/aratio and background dielectricconstants. because we designed our structure in a way that the photonic band gaps appear in a range of telecommunication wavelength the results showed that these structures will be applicable in different photonic devices such as optical filters.