Terahertz Surface Plasmon-Polariton Propagation and Focusing on Periodically Corrugated Metal Wires
Terahertz Surface Plasmon-Polariton Propagation and Focusing on Periodically Corrugated Metal Wires
In this Letter, we show how the dispersion relation of surface plasmon polaritons (SPPs) propagating along a perfectly conducting wire can be tailored by corrugating its surface with a periodic array of radial grooves. In this way, highly localized SPPs can be sustained in the terahertz region of the electromagnetic …