title: Polarization-independent negative-index metamaterial in the near infrared.
abstract: We present and evaluate theoretically and experimentally a design for a negative-index metamaterial that is termed the "Swiss cross" structure. Compared with the established fishnet structure, the proposed design eliminates the drawback of polarization-dependent effective optical parameters. The new design is fabricated by means of e-beam technology and experimentally analyzed using spectroscopic techniques. The thorough comparison with numerical simulations reveals an effective refractive index of n=-1.9 at an operational wavelength of 1400 nm that is independent of the incident polarization. The resonances of the system are comprehensively discussed.
authors.affiliation: Center for Innovation Competence "ultra optics," Institute of Applied Physics, Friedrich-Schiller-Universität Jena, Jena, Germany. christianhelgert@uni-jena.de
authors.forename: C
authors.initials: C
authors.lastname: Helgert
authors.forename: C
authors.initials: C
authors.lastname: Menzel
authors.forename: C
authors.initials: C
authors.lastname: Rockstuhl
authors.forename: E
authors.initials: E
authors.lastname: Pshenay-Severin
authors.forename: E-B
authors.initials: EB
authors.lastname: Kley
authors.forename: A
authors.initials: A
authors.lastname: Chipouline
authors.forename: A
authors.initials: A
authors.lastname: Tünnermann
authors.forename: F
authors.initials: F
authors.lastname: Lederer
authors.forename: T
authors.initials: T
authors.lastname: Pertsch