Introducing dipole-like resonance into magnetic resonance to realize simultaneous drop in transmission and reflection at terahertz frequency

A metamaterial (MM) consisting of double layer closed rings (DCRs) and a split-wire shows the different manipulations of the transmission T(omega) and reflection R(omega) to obtain simultaneous minimums. Parametric studies on the MM and a further LC circuit model are proposed, showing that the phenomenon is dominated by the interaction of the additional dipole-like resonance supported by the split-wire and the primary magnetic resonance supported by DCRs. Simultaneous sharp drops in T(omega) and R(omega) are observed in our MM at about 2.45 THz. The potential applications for near-perfect absorption and dual-directional absorption are discussed. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3467528]