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Resonant transparency of materials with negative permittivity

E. Fourkal·I. Velchev·C-M. Ma·A. Smolyakov
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Abstract

It is shown that the transparency of opaque material with negative permittivity exhibits resonant behavior. The resonance occurs as a result of the excitation of the surface waves at slab boundaries. Dramatic field amplification of the incident evanescent fields at the resonance improves the resolution of the the sub-wavelength imaging system (superlens). A finite thickness slab can be totally transparent to a \textit{p}-polarized obliquely incident electromagnetic wave for certain values of the incidence angle and wave frequency corresponding to the excitation of the surface modes. At the resonance, two evanescent waves have a finite phase shift providing non-zero energy flux through the non-transparent region.

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E. Fourkal, I. Velchev, C-M. Ma, A. Smolyakov. 2006-07-13. Resonant transparency of materials with negative permittivity. https://doi.org/10.1016/j.physleta.2006.09.091

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