Experimental verification of a tunable left-handed material by bias magnetic fields

We designed a two-dimensional periodic composite made of ferrite rods and metallic wires, and theoretically proved the composite in magnetized state had a tunable left-handed material (LHM) regime by its transmission properties and the retrieved effective permittivity and permeability. Further, we fabricated a sample as designed, and experimentally demonstrated the LHM regime by the sample's abnormal transmission in bias magnetic fields. The abnormal transmission changes with the intensity of the bias magnetic field showing the frequency tunable character of the LHM regime. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3409120]