High-order small perturbation method for scattering from layered structure with multilayer rough interfaces

A general explicit closed-form expression of high-order perturbative solutions of the problem of radiation and propagation electromagnetic (EM) fields in a layered structure with multilayer rough interfaces is developed in the framework of classical small perturbation method (SPM). The high-order SPM expression of the electric and magnetic fields in each region of the rough-layered structure is provided by theoretical analysis and fully formula derivation instead of considering any other approximation and equivalent process. We give the EM scattering, propagation physical mechanism in layered medium in order to achieving good understanding the properties of high-order scattering components, which is helpful for deriving the each highorder perturbative solutions of EM scattering from layered structure with multilayer rough interfaces. The influence of the representative second-order scattering component on global scattering field is described by numerical results.