title: Negative refraction can make non-diffracting beams.
abstract: We report the results of simulations relating to the illumination of a structure consisting of a slab constructed from a 2-D hexagonal array of metal rods with a terahertz frequency source. As a consequence of negative refraction an essentially non-divergent beam pattern is observed. Although the results presented relate to the terahertz regime they should also be applicable at other frequencies.
authors.affiliation: Department of Physics, Durham University, Durham, United Kingdom.
authors.forename: M A
authors.initials: MA
authors.lastname: Kaliteevski
authors.forename: S
authors.initials: S
authors.lastname: Brand
authors.forename: R A
authors.initials: RA
authors.lastname: Abram
authors.forename: A J
authors.initials: AJ
authors.lastname: Gallant
authors.forename: J M
authors.initials: JM
authors.lastname: Chamberlain
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods*; D012542:Scattering, Radiation
chemical_list: D008670:Metals