title: Low-loss left-handed materials using metallic magnetic cylinders.
abstract: We discuss materials based on arrays of metallic magnetic cylindrical structures near ferromagnetic resonance with applied magnetic fields at microwave frequencies. We have found that the materials have a negative refraction index by combining the effective negative permittivity and permeability. Numerical finite-difference time-domain simulations were performed, after a very large number of geometries were swept. The simulations reveal that ferromagnetic cylinders, with diameters of 0.1 cm and 0.5 cm apart, and with periodic or random configurations, are left-handed materials with very small losses; i.e., with transmittivity practically unity or no loss. The way to obtain convenient structures and geometries is also discussed.
authors.affiliation: Laboratorio de Física de Sistemas Pequeños y Nanotecnología, Consejo Superior de Investigaciones Científicas, Serrano 114, 28006 Madrid, Spain.
authors.forename: N
authors.initials: N
authors.lastname: García
authors.forename: E V
authors.initials: EV
authors.lastname: Ponizovskaia