Enhanced transmission of transverse electric waves through subwavelength slits in a thin metallic film

TL;DR

This paper demonstrates a method to significantly enhance the transmission of transverse electric waves through subwavelength slits in a metallic film by using a metallized cover layer with a cut wire array, achieving an 800-fold increase.

Contribution

The study introduces a novel approach using a metallized cover with cut wires to greatly improve TE wave transmission through subwavelength slits, leveraging electric dipole-like resonance.

Findings

800-fold transmission enhancement achieved

TE waves confined by cut wires due to electric dipole resonance

Effective squeezing of TE waves through subwavelength slits

Abstract

y coating a cover layer with metallization of cut wire array, the transmission of transverse electric waves (TE; the electric field is parallel to the slits) through subwavelength slits in a thin metallic film is significantly enhanced. An 800-fold enhanced transmission is obtained compared to the case without the cut wires. It is demonstrated that a TE incident wave is highly confined by the cut wires due to the excitation of the electric dipole-like resonance, and then effectively squeezed into and through the subwavelength slits.