# Metasurface-Enabled Interference Suppression at Visible-Light Communications

## TL;DR

This paper introduces a nanoslit metasurface that significantly improves the directivity and interference suppression in visible-light communication systems, enhancing signal quality and reliability.

## Contribution

It proposes a simple nanoslit metasurface design to increase beam directivity, reducing interference in VLC systems, which is a novel approach for interference mitigation.

## Key findings

- Signal-to-interference ratio improved by several orders of magnitude
- Metasurface maintains performance despite realistic design defects
- Potential to influence standardization of VLC technologies

## Abstract

Light can be used for wireless information transmission apart from illumination; that is the key idea behind visible-light communication (VLC), one of the disruptive technologies of our days. It combines remarkably high data rates due to ultrashort wavelengths with huge reliability and security due to small distances; nevertheless, it substantially suffers from interference of neighboring light sources in multiple-link configurations. In this manuscript, we investigate a pair of light emitting diodes (LEDs) interfering each other and propose a simple nanoslit metasurface that radically increases the directivity of the transmitting beams. As a result, enhancement of the signal-to-interference ratio by several orders of magnitude is reported. The considered generic setup retains its beneficial features in the presence of realistic design defects and, accordingly, may inspire standardization efforts towards the adoption of VLC in next-generation heterogeneous communication networks.