Broadband antireflection with halide-perovskite metasurfaces

TL;DR

This paper demonstrates broadband antireflection using halide-perovskite metasurfaces by overlapping electric and magnetic resonances, significantly reducing reflection and enhancing photoluminescence for optoelectronic applications.

Contribution

It introduces a novel approach to broadband antireflection in halide-perovskite metasurfaces via generalized Kerker conditions, enabling improved light control in optoelectronic devices.

Findings

Reflection suppressed down to 4% across a broad spectrum

Metasurface nanostructuring enhances photoluminescence

Potential applications in photovoltaics and multifunctional metadevices

Abstract

Meta-optics based on optically-resonant dielectric nanostructures is a rapidly developing research field with many potential applications. Halide perovskite metasurfaces emerged recently as a novel platform for meta-optics, and they offer unique opportunities for control of light in optoelectronic devices. Here we employ the generalized Kerker conditions to overlap electric and magnetic Mie resonances in each meta-atom of MAPbBr3 perovskite metasurface and demonstrate broadband suppression of reflection down to 4%. We reveal also that metasurface nanostructuring is also beneficial for the enhancement of photoluminescence. Our results may be useful for applications of nanostructured halide perovskites in photovoltaics and semi-transparent multifunctional metadevices where reflection reduction is important for their high efficiency.