title: Double-negative polarization-independent fishnet metamaterial in the visible spectrum.
abstract: We show that a second-order magnetic resonance present in the fishnet metamaterial can be enhanced so as to achieve simultaneous negative permittivity and permeability in the visible range. The double-negative behavior leads to reduced losses in this particular fishnet metamaterial. We also study the stacking of several functional layers, verifying the convergence of the refractive index.
authors.affiliation: Valencia Nanophotonics Technology Center, Universidad Politécnica de Valencia, 46022 Valencia, Spain. cargarm2@ntc.upv.es
authors.forename: C
authors.initials: C
authors.lastname: García-Meca
authors.forename: R
authors.initials: R
authors.lastname: Ortuño
authors.forename: F J
authors.initials: FJ
authors.lastname: Rodríguez-Fortuño
authors.forename: J
authors.initials: J
authors.lastname: Martí
authors.forename: A
authors.initials: A
authors.lastname: Martínez