Green's function methods in photonic crystals and clusters

In the semiclassical framework, resonant photonic crystals and clusters computation requests to solve self-consistently the Schroedinger-Maxwell coupled equations in order to study linear and non-linear optical properties of mesoscopic materials. In a non-local spatially periodic medium the electromagnetic propagation properties will be computed by transforming integral differential Maxwell equations in integral equations, therefore, the Green s function formalism usually take a crucial role in the optical computation.