Microwave metal-dielectric metamaterials with magnetic inclusions

Use of natural magnetic materials as a constituent part of metamaterials is attractive as they provide a possibility to tune material parameters at microwave range and THz frequency with external magnetic fields. Metal-dielectric multilayers and wire arrays structures were fabricated using both ferromagnetic and nonmagnetic metals. These structures were studied in free space microwave propagation experiment. We show that a cube of such a metamaterial operates as a focusing lens and a polarizer with a possibility of tuning with external magnetic field.