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arXiv · 1008.4480

Experimental evidence of cut-wire-induced enhanced transmission of transverse-electric fields through sub-wavelength slits in a thin metallic screen

Emiliano Di Gennaro·Ilaria Gallina·Antonello Andreone·Giuseppe Castaldi·Vincenzo Galdi
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Abstract

Recent numerical studies have demonstrated the possibility of achieving substantial enhancements in the transmission of transverse-electric-polarized electromagnetic fields through subwavelength slits in a thin metallic screen by placing single or paired metallic cut-wire arrays at a close distance from the screen. In this Letter, we report on the first experimental evidence of such extraordinary transmission phenomena, via microwave (X/Ku-band) measurements on printed-circuit-board prototypes. Experimental results agree very well with full-wave numerical predictions, and indicate an intrinsic robustness of the enhanced transmission phenomena with respect to fabrication tolerances and experimental imperfections.

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Emiliano Di Gennaro, Ilaria Gallina, Antonello Andreone, Giuseppe Castaldi, Vincenzo Galdi. 2010-08-26. Experimental evidence of cut-wire-induced enhanced transmission of transverse-electric fields through sub-wavelength slits in a thin metallic screen. https://doi.org/10.1364/oe.18.026769

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