  We investigate the storage and retrieval of electromagnetic waves using a
nonlinear metamaterial, analogous to the electromagnetically induced
transparency (EIT) observed in atomic systems. We experimentally demonstrate
the storage of the electromagnetic wave by reducing an auxiliary "control"
wave; the stored wave is then released by recovering the control wave. We also
confirm that the metamaterial can store and reproduce the phase distribution of
the original input wave. These effects confirm a remarkable analogy between the
metamaterial and an atomic EIT medium.
