Plasmonless polarization-selective metallic Semi-coaxial Aperture Arrays in the visible range

TL;DR

This paper introduces a novel polarization-sensitive metallic aperture array that achieves high transmission efficiency without plasmonic resonance, combining numerical and experimental validation for visible-range applications.

Contribution

It presents a new design of semi-coaxial aperture arrays that function as efficient, plasmonless polarizers with high extinction ratios and transmission in the visible spectrum.

Findings

Achieves up to 85% transmission efficiency.

Extinction ratio of 15:1 for polarization selectivity.

Experimental results agree with numerical simulations.

Abstract

In this letter, we perform numerical and experimental studies of the optical response of an original configuration based on enhanced transmission through guided mode based metamaterials. The proposed structure is inspired by annular aperture array (AAA) where the cylindrical symmetry is broken in order to acquire polarization-sensitive metasurfaces. The experimental results, which are in good agreement with numerical simulations, demonstrate that the structure acts as a polarizer exhibiting an extinction ratio of (15:1) with a maximum transmission coefficient up to 85% which is more efficient than what it is expected with a typical plasmonic resonance