Dimer and polymer metamaterials with alternating electric and magnetic couplingстатья
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Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
Аннотация:Diatomic metamaterials whose properties can be easily tailored are studied with the aid of split ring resonator elements. Two different types are shown to exist depending on the coupling within a unit cell being larger or smaller than that between the unit cells. The freedom to adjust the coupling coefficients is used to construct a chain in which coupling alternates between electric and magnetic between positive and negative. The resulting dispersion characteristics are shown to be radically different from the classical acoustic and optical branches: the upper branch is a forward wave and the lower branch is a backward wave and even the gap between the two pass bands may disappear yielding infinite phase finite group-velocity wave. The theory is confirmed both by simulations and experiments.