title: Magnetic metamaterials in the blue range using aluminum nanostructures.
abstract: We report an experimental and theoretical study of the optical properties of two-dimensional arrays of aluminum nanoparticle in-tandem pairs. Plasmon resonances and effective optical constants of these structures are investigated, and strong magnetic response as well as negative permeability is observed down to 400 nm wavelength. Theoretical calculations based on the finite-difference time-domain method are performed for various particle dimensions and lattice parameters, and are found to be in good agreement with the experimental findings. The results show that metamaterials operating across the whole visible wavelength range are feasible.
authors.affiliation: Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
authors.forename: Yogesh
authors.initials: Y
authors.lastname: Jeyaram
authors.forename: Shankar K
authors.initials: SK
authors.lastname: Jha
authors.forename: Mario
authors.initials: M
authors.lastname: Agio
authors.forename: Jörg F
authors.initials: JF
authors.lastname: Löffler
authors.forename: Yasin
authors.initials: Y
authors.lastname: Ekinci