title: Negative refraction and lensing at visible wavelength: experimental results using a waveguide array.
abstract: Experimental results showing "negative refraction" and some kind of "lensing" -in the microwave-infrared range- are often presented in the literature as undisputable evidence of the existence of composite left-handed materials. The purpose of this paper is to present experimental results on "negative refraction" and "lensing" at visible wavelengths involving a waveguide array formed by a tight-packed bundle of glass fibers. We will demonstrate that the observed phenomena are not necessarily evidence of the existence of left-handed materials and that they can be fully explained by classical optic concepts, e.g. light propagation in waveguides.
authors: Instituto de Física, Facultad de Ingeniería (UdelaR), Montevideo, Uruguay. jferrari@fing.edu.uy
authors: José A
authors: JA
authors: Ferrari
authors: Erna
authors: E
authors: Frins
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D012031:Refractometry / Q000295:instrumentation*