Modeling of Wave Scattering by Graphene Strip Gratings Using Integral Equations Combined with Operator Method

The scattering by graphene multi-layered strip grating is considered. To model the whole structure two different approaches are used and compared. The first one is based on the operator method. Here we obtain system of operator equations which are equivalent to the Fredholm integral equations. The solution of a so-called key problem, the diffraction problem by a single planar graphene grating, is obtained by the method of singular integral equations. The second approach is based entirely on the method of singular integral equations. Frequency dependences of the scattering and absorption coefficients are presented in the THz range.