Ultrathin Corrugated Metallic Strips for Ultrawideband Surface Wave Trapping at Terahertz Freq uencies

摘要

The finite element method has been used to simulate the dispersion properties of the ultrathin spoof slow-wave plasmonic waveguide on basis of different ultrathin metal strip grooves. We analyze the dispersion curves, electric intensity distribution and power flow distribution. To conclude, the most ideal slow-wave system is the arch-shape waveguide. Analysis of such an ultrathin arch-shape waveguide presents an ultrawideband performance for trapping surface waves, which permits broadband trapping of terahertz radiation.