Superlens with copper and copper oxide

TL;DR

This paper explores a copper-based superlens with copper oxide, demonstrating subwavelength imaging of about λ/9 resolution, influenced by excitonic effects, and suggests potential for tunable, nonlinear lens designs.

Contribution

It introduces a superlens utilizing copper and copper oxide, analyzing excitonic effects on imaging, and proposes tunable, nonlinear optical properties for advanced lens applications.

Findings

Achieved subwavelength resolution of λ/9 in simulations.

Excitonic resonances affect optical properties and image quality.

Plasmon-exciton interactions enable tunable superlens designs.

Abstract

We investigate the imaging properties of copper-based superlens surrounded by copper oxide (Cu$_2$O). A subwavelength image resolution of the order $\lambda/9$ is demonstrated theoretically and verified in numerical simulations. It is shown that the existence of excitons in Cu$_2$O influence the static and dynamical optical properties of the lens. In particular, an improvement of image quality caused by absorption in the spectral region of excitonic resonances is investigated. The plasmon-exciton interaction in the system may pave the way to a tunable, highly nonlinear superlens designs.