Transmission of intense laser light through foil with subwavelength-holes array

Transmission of intense laser light through a thin foil containing multiple near- or sub-wavelength holes is investigated using electromagnetic particle-in-cell simulation. It is found that the intensity of transmitted light neither increased with hole size nor decreased with the hole separation distance monotonically, but there are several maximum transmissivities with optimized parameters. Despite the nonlinear light-matter interaction that can accelerate and expel electrons and, eventually, also ions in the foil, the dependence of the transmitted light intensity on the foil and hole properties is similar to that of extraordinary optical transmission in the nondestructive interaction of weak light of the same profile with thin multiholed metal foils, provided that the ratio width:length:period of the hole dimensions is similar.