Resonant scattering of light by finite sparse configurations of silver nanowires

We consider the two-dimensional (2-D) scattering of the H-polarized plane wave by three discrete configurations made of periodically arranged circular cylindrical wires, using the field expansions in local coordinates and addition theorems for cylindrical functions. Resulting block-type matrix equation is cast to the Fredholm second-kind form that guarantees convergence of numerical solution. The scattering and absorption cross-sections and the near-field patterns are computed. The interplay of plasmon and grating-type resonances is studied for discrete arrays, corners and crosses made of nano-size silver wires in the visible range of wavelengths.