title: Terahertz scattering by subwavelength cylindrical arrays.
abstract: We demonstrate the use of a full-wave electromagnetic field simulator to verify terahertz (THz) transmission-mode spectroscopic measurements of periodic arrays containing subwavelength cylindrical scatterers. Many existing THz scattering studies utilize analytical solutions, which were developed for a single scatterer. For multiple scatterers, a scaling factor equal to the number of scatterers is applied, accounting for interference between far-field radiative contributions from those scatterers but not their near-field mutual coupling. Consequently, analytical solutions do not accurately verify measurements. Conversely, results from the full-wave electromagnetic field simulator elucidate our measurements well, and provide an important insight into how the scattering behavior of cylindrical scatterers is influenced by test conditions.
authors.affiliation: School of Electrical and Electronic Engineering, University of Adelaide, SA 5005, Australia. gretel.png@adelaide.edu.au
authors.forename: Gretel M
authors.initials: GM
authors.lastname: Png
authors.forename: Christophe
authors.initials: C
authors.lastname: Fumeaux
authors.forename: Mark R
authors.initials: MR
authors.lastname: Stringer
authors.forename: Robert E
authors.initials: RE
authors.lastname: Miles
authors.forename: Derek
authors.initials: D
authors.lastname: Abbott
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000379:methods*; D011827:Radiation; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods; D055053:Terahertz Radiation; D055068:Terahertz Spectroscopy