Transparency of overdense plasma with V shape density profile

In this study, we investigate the transparency of an over-dense inhomogeneous plasma slab. This anomalous transmission is achieved when the conditions are provided for the incident electromagnetic wave to excite coupled surface waves on both sides of the slab. These conditions require that the homogeneous overdense plasma, or the metallic film, is placed between two dielectric layers. Here, the inhomogeneity of the plasma allows us to naturally establish the conditions by considering a specific shape for the geometry of the density profile. Within this profile, the density linearly grows up from both sides of the slab while the corresponding dielectric permittivity simultaneously gains negative values. We obtain the exact solutions of the wave equations inside the plasma and study the conditions for high transparency. The transmission losses due to the collision effects are also discussed.