Fig. 1. Metal disc structure

Fig. 2. Reflection spectrum of a metal disk as the number of metal elements N changes

Fig. 3. Field distribution and surface current distribution of the different resonant modes

Fig. 4. Scattered power spectrum of dipole

Fig. 5. Reflection spectra of metamaterials are obtained when only the ring opening size g is changed and only the cell height d is changed

Fig. 6. Reflection spectrum of metamaterials when the dielectric constant of dielectric plate ε is changed.