Interaction effects in two-dimensional bianisotropic arrays

Electromagnetic excitation of two-dimensional (2-D) arrays of bianisotropic particles by plane waves is considered. Arrays (grids) are assumed to be infinite and the particles to be small compared to the wavelength, so that the dipole approximation is possible. The electromagnetic interaction between all the particles changes the properties of these particles (in particular, chiral and omega particles are studied). The analytical model under consideration allows one to express the electric and magnetic moments induced in each particle through the incident wave fields in terms of collective polarizability dyadics (CPDs). The proposed method to evaluate these dyadics combines numerical and analytical parts. The results of the calculations of the induced electric and magnetic moments by plane waves are presented for a planar arrangement of omega particles.