# Nonlocal effects in singular plasmonic metasurfaces

## TL;DR

This paper demonstrates that nonlocal effects significantly modify the optical response of singular plasmonic metasurfaces, changing their absorption spectrum from continuous to discrete and reducing energy concentration at singularities.

## Contribution

It reveals the impact of nonlocality on singular plasmonic metasurfaces, providing a more accurate model of their optical behavior compared to local theories.

## Key findings

- Spectrum becomes discrete due to nonlocal effects
- Energy concentration at singularities is reduced
- Nonlocality alters absorption characteristics of metasurfaces

## Abstract

A local model of the dielectric response of a metal predicts that singular surfaces, such as sharp-edged structures, have a continuous absorption spectrum and extreme concentration of energy at the singularity. Here we show that nonlocality drastically alters this picture: the spectrum is now discrete and energy concentration, though still substantial, is greatly reduced.