Photonic bands of metallic systems. II. Features of surface plasmon polaritons

The photonic band structure of a two-dimensional square lattice composed of metallic cylinders was calculated for the H polarization by means of the numerical simulation of dipole radiation based on the finite-difference time-domain method. The presence of radiational eigenmodes that originate from surface plasmon polaritons was clearly shown by the symmetry and the localized nature of the field distribution.