Abstract
In this paper, THz Sommerfeld wave propagation on single bare metal wire and dielectrically coated metal wire waveguide is presented by the numerical calculation from 0.1THz to 1THz. The influences of different metal and different dielectric materials on the electric field distribution around the metal wire are analyzed. The characteristics of energy coupling in the coated metal wire with different metal and dimensions are also proposed. The analysis results release a fundamental characteristic for describing the surface wave propagation along the dielectrically coated metal wire at terahertz frequencies, and moreover, the analysis results also suggest that a simple dielectrically coated metal-wire can be used for terahertz applications due to its energy concentration, as compared to the single bare metal wire.
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