Numerical study of a quasi-zero-index photonic metamaterial

Nanostructures made of metallic cube are arranged in Kagome lattice. Transmitted and reflected electromagnetic fields of normally incident circular polarized plane waves are computed using a tri-dimensional (3D) finite-difference time domain (FDTD) algorithm. Equivalent refractive index, equivalent permittivity, equivalent permeability and normalized impedance are calculated using the modified S-parameter retrieval method. Around the 7.912×1014 Hz and 9.376×1014 Hz, the structure performance for quasi-zero-index frequency bands.