caa a22 4500 445866705 CHVBK 20180317145500.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1140/epjd/e2011-10438-4 doi (NATIONALLICENCE)springer-10.1140/epjd/e2011-10438-4 Influence of the sign of the refractive index in the reflectivity of a metamaterial surface with localized roughness [Elektronische Daten] [V. Grünhut, R. Depine] To study the scattering properties of metamaterials, we generalize two scattering methods developed for conventional (non-magnetic) isotropic materials to the case of materials with arbitrary values (positive or negative) of magnetic permeability and electric permittivity. The generalized methods are used to study the changes produced in the reflectivity of a metamaterial surface with localized roughness when the relative refractive index changes sign. Our results show that, unlike the case of a plane surface whose reflectivity is unaffected by the change of sign of the relative refractive index, in rough surfaces the change of sign is manifested in the reflectivity, even for very low roughness, particularly in observation directions away from the specular direction. EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011 Grünhut V. Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, C1428, EHA Buenos Aires, Argentina aut Depine R. Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, C1428, EHA Buenos Aires, Argentina aut The European Physical Journal D Springer-Verlag 62/2(2011-04-01), 227-236 1434-6060 62:2<227 2011 62 10053 https://doi.org/10.1140/epjd/e2011-10438-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1140/epjd/e2011-10438-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Grünhut V. Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, C1428, EHA Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Depine R. Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, C1428, EHA Buenos Aires, Argentina aut NATIONALLICENCE 773 0- The European Physical Journal D Springer-Verlag 62/2(2011-04-01), 227-236 1434-6060 62:2<227 2011 62 10053 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer