Enhanced terahertz transmission: Comparisons between metal and absorber, random and periodic arrays of holes

The Effect of Rotational Disorder on the Microwave Transmission of Checkerboard Metal Square Arrays

“…The disruption of the array’s periodicity destroyed the resonant transmission, and the arrays showed the high and low pass filtering behaviour reminiscent of metallic meshes below the diffraction edge. Seo et al reported similar findings at terahertz frequencies, demonstrating that periodic hole arrays could support surface plasmon like waves whereas similar arrays of randomly distributed holes could not 28 . The region between the periodic and the fully random has been explored by Nishiima et al 29 who illustrated the effect on plasmonic resonances of gradually increasing the spatial disorder of gold nano-disks, and reported a broadening and lowering of the transmission extinction peak.…”