Orientational dependence of inter-meta-atom interactions in the split-ring and circular-ring resonator arrays

The dependence of the transmission spectra for the array composed of the planar split-ring and circular-ring on meta-atom orientation has been studied experimentally and by simulation in the terahertz region. We observe the systematic change of the spectra with the meta-atom orientation and interpreted it by the interaction among the meta-atoms in the periodic array structure.