Subwavelength resolution for horizontal and vertical polarization by coupled arrays of oblate nanoellipsoids

TL;DR

This paper proposes a coupled array of oblate nanoellipsoids as a superlens capable of achieving subwavelength resolution for both polarizations at distances greater than half-wavelength, with a large bandwidth.

Contribution

It introduces a novel superlens design using coupled nanoellipsoids that restores subwavelength features for both polarizations with high bandwidth.

Findings

Achieves subwavelength resolution for both polarizations

Operates at distances larger than half-wavelength

Bandwidth of resolution exceeds 13%

Abstract

A structure comprising a coupled pair of two-dimensional arrays of oblate plasmonic nanoellipsoids in a dielectric host medium is proposed as a superlens in the optical domain for both horizontal and vertical polarizations. By means of simulations it is demonstrated that a structure formed by silver nanoellipsoids is capable of restoring subwavelength features of the object for both polarizations at distances larger than half-wavelength. The bandwidth of subwavelength resolution is in all cases very large (above 13%).