A tunable double negative device consisting of a plasma array and a negative-permeability metamaterial
Akinori Iwai, Fabio Righetti, Benjamin Wang, Osamu Sakai, Mark Cappelli
Abstract
Extraordinary wave transmission is demonstrated through a double-negative composite comprised of a negative-permeability array of double split ring resonators and a negative-permittivity array of plasma discharge tubes at microwave frequencies. A transmission peak emerges in a double-negative band and controlling the electron density inside the plasma tubes dynamically regulates the transmission properties. By performing experiments and theoretical calculations, we verify that the composite permits wave propagation with negative permeability and controllable permittivity, which indicates that a tunable negative-refractive-index device is achieved.
Topics & Concepts
MetamaterialPermittivityPhysicsPlasmaSplit-ring resonatorResonatorMicrowavePermeability (electromagnetism)Waves in plasmasNegative index metamaterialsOptoelectronicsOpticsDielectricGeneticsQuantum mechanicsBiologyMembraneMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface TechnologiesAntenna Design and Analysis