Towards Random Metasurface based Devices

TL;DR

This paper introduces design principles for creating efficient random metasurfaces with anisotropic elements, demonstrating their potential in near-infrared metalenses and broadening applications in metamaterials.

Contribution

It presents novel design rules for random metasurfaces, analyzing the effects of element density and applying the approach to polarization-independent metalenses.

Findings

Random metasurfaces can achieve high performance with optimized element density.

Numerical simulations validate the effectiveness of the proposed design rules.

Potential applications include lenses and solar energy concentrators.

Abstract

Metasurfaces are generally designed by placing scatterers in a periodic grid. We propose and discuss design rules for efficient random and functional metasurfaces with anisotropic elements. We investigate the impact of the elements density on the performance of metasurfaces in both periodic and random cases. Using numerical simulations, we apply our approach to the design of all-polarization random metalenses at near infrared frequencies. The results will open a new paradigm in the design of metamaterial and metasurface devices from lenses to solar energy concentrators.