  We propose a metamaterial to realize true electromagnetically induced
transparency (EIT), where the incidence of an auxiliary electromagnetic wave
called the control wave induces transparency for a probe wave. The analogy to
the original EIT effect in an atomic medium is shown through analytical and
numerical calculations derived from a circuit model for the metamaterial. We
performed experiments to demonstrate the EIT effect of the metamaterial in the
microwave region. The width and position of the transparent region can be
controlled by the power and frequency of the control wave. We also observed
asymmetric transmission spectra unique to the Fano resonance.
