Characterization and electromagnetic response of a ϕ-shaped metamaterialN. T. Tung, J. W. Park, V. T.T. Thuy, P. Lievens, Y. P. Lee and V. D. LamEur. Phys. J. B, 81 3 (2011) 263-268DOI: https://doi.org/10.1140/epjb/e2011-20114-2