Abstract
We theoretically flnd that a bi-layer structure composed of two kinds of dispersive metamaterials can possess an asymmetric re∞ection spectrum due to Fano-type interference between a discrete re∞ection resonance and a broadband strong re∞ection. The discrete re∞ection resonance appears at the frequency around which the dispersive permeability is near to zero at oblique incidence. Based on analytical and numerical analysis, the asymmetric factor in the Fano-type re∞ection is found to be linked with the angle of incidence.
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