Metamaterials

11. Metamaterials

Models of dispersive dielectric materials were provided in version 5.0. Now in version 6.0 they have been extended to metamaterials. Metamaterial has electric conductivity Sigma = s [S/m] and magnetic loss SigmaM [W/m] defined analogously as for dielectric isotropic. Its complex permittivity (including series loss) and complex permeability (including series magnetic loss) are given by Debye, Drude or Lorentz dispersion model with user-specified parameters, see Section E 2.5.3. Metamaterials may assume effective negative values of permittivity and permeability in certain frequency ranges. They are then called double-negative or left-handed media, and support backward waves with propagation vector oriented in the opposite direction to the Poynting vector.