title: Double-element metamaterial with negative index at near-infrared wavelengths.
abstract: We present the realization of a metamaterial that combines double cut wires and continuous wires in its unit cell. This double-element geometry together with the applied layer-by-layer fabrication technique permits an independent tuning of the geometry of the unit-cell components. The characterization of the samples is based on the measurement of transmission and reflection spectra combined with rigorous numerical simulations. The results show that the metamaterial exhibits an effective refractive index of n=-0.5+1.9i at the wavelength lambda=2.1 microm.
authors.affiliation: Center for Innovation Competence "Ultra Optics," Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena, Germany. ekaterina.pshenay-severin@uni-jena.de
authors.forename: Ekaterina
authors.initials: E
authors.lastname: Pshenay-Severin
authors.forename: Uwe
authors.initials: U
authors.lastname: Hübner
authors.forename: Christoph
authors.initials: C
authors.lastname: Menzel
authors.forename: Christian
authors.initials: C
authors.lastname: Helgert
authors.forename: Arkadi
authors.initials: A
authors.lastname: Chipouline
authors.forename: Carsten
authors.initials: C
authors.lastname: Rockstuhl
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann
authors.forename: Falk
authors.initials: F
authors.lastname: Lederer
authors.forename: Thomas
authors.initials: T
authors.lastname: Pertsch