Numerical analysis of micro-structured materials effect on electromagnetic field shielding in a wide frequency range

The interaction of high-intensity light sources with solid targets generates intense broadband electromagnetic (EM) pulses in a wide frequency range, from radio frequency to x-rays with multiple biological effects at cellular level. In this work, we elaborated a 3D numerical model to investigate the behavior of particular shielding materials and to compare their performances at some different frequencies, considered as relevant both for the generated frequencies and for the cell's absorbed wavelengths under the conditions imposed by high energy experiments planned to be performed at facilities in ultra-intense regime. The 3D numerical simulations of the electromagnetic field shielding have been made using Finite-Difference Time-Domain (FDTD) method to design and investigate different structures both as metallic foil or mesh and to evaluate their efficiency in a wide frequency regime (100 - 4000 MHz) being relevant for EM shielding in various light-matter interaction experiments in ultra-intense regime.