title: Inhibiting the TE1-mode diffraction losses in terahertz parallel-plate waveguides using concave plates.
abstract: We present numerical and experimental results on inhibiting diffraction losses associated with the lowest order transverse electric (TE1) mode of a terahertz (THz) parallel-plate waveguide (PPWG) via the use of slightly concave plates. We find that there is an optimal radius of curvature that inhibits the diffraction for a given waveguide operating at a given frequency. We also find that introducing this curvature does not introduce any additional group-velocity dispersion. These results support the possibility of realizing long range transport of THz radiation using the TE1 mode of the PPWG.
authors.affiliation: Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77251, USA.
authors.forename: Marx
authors.initials: M
authors.lastname: Mbonye
authors.forename: Rajind
authors.initials: R
authors.lastname: Mendis
authors.forename: Daniel M
authors.initials: DM
authors.lastname: Mittleman
mesh_terms: D004867:Equipment Design; D020342:Finite Element Analysis; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation / Q000379:methods*; D012542:Scattering, Radiation; D055068:Terahertz Spectroscopy / Q000295:instrumentation / Q000379:methods*