Abstract
In this paper, models of cross metallic metasurfaces absorbers for electromagnetic waves in the terahertz (THz) frequency range are reported and discussed. The absorption of a cross unit cell with linear and circular polarization for high frequencies is investigated. The analytical modeling presented by this paper allows to have a modeling support to optimize the design of metallic absorbers for terahertz applications. This study proves that the absorption coefficient depends on the impedance of the metasurface and its dimensions. Also, these results show that inductive meatsurfaces are used when the cell size is too smaller than the wavelength while capacitive metasurfaces are used in the other case. Our simulations demonstrate that the optimum width of this structure (grid) at frequency around 200GHz is around . All the results indicate the cross metallic structure is promising for terahertz absorption applications.