Electromagnetic scattering from composite periodic arrays of cylindrical objects

A very efficient and accurate method to characterize the electromagnetic scattering from two-dimensional periodic arrays of composite cylindrical objects is presented, using the lattice sums formula and the aggregate T-matrix for cylindrical structures. The method is quite general and applies to various configurations of two-dimensional periodic arrays. The unit cell of the array can contain two or more cylinders, which may be dielectric, conductor, gyrotropic medium, or their mixture with different sizes.