Dual band terahertz waveguiding on a planar metal surface patterned with annular holes Appl. Phys. Lett. 96, 011101 (2010); 10.1063/1.3276545Enhanced zero-order transmission of terahertz radiation pulses through very deep metallic gratings with subwavelength slits

No abstract

It is shown that resonance features analogous to the well known in optics Wood-type anomalies can be observed in the terahertz range on a periodically profiled surface of a highly doped semiconductor at low temperatures. The anomalies are caused by surface plasmon polariton excitation under diffraction on the surface. The results are of interest both from the physical viewpoint and due to a wide field of possible applications in present-day information technologies.