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arXiv · 0808.1635

Resonant Transmission of Electromagnetic Fields through Subwavelength Zero-$ε$ Slits

Klaus Halterman·Simin Feng
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Abstract

We theoretically investigate the transmission of electromagnetic radiation through a metal plate with a zero-$ε$ metamaterial slit, where the permittivity tends towards zero over a given bandwidth. Our analytic results demonstrate that the transmission coefficient can be substantial for a broad range of slit geometries, including subwavelength widths that are many wavelengths long. This novel resonant effect has features quite unlike the Fabry-Pérot-like resonances that have been observed in conductors with deep channels. We further reveal that these high impedance ultranarrow zero-$ε$ channels can have significantly {\it greater} transmission compared to slits with no wave impedance difference across them.

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Klaus Halterman, Simin Feng. 2008-08-12. Resonant Transmission of Electromagnetic Fields through Subwavelength Zero-$ε$ Slits. https://doi.org/10.1103/physreva.78.021805

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