# Demonstration and Control of “Spoof-Plasmon” Scattering from 3D Spherical Metaparticles

## TL;DR

This paper explores how 3D spherical structures can mimic metal nanostructures at lower frequencies, enabling control over scattering behaviors for applications like radar.

## Contribution

The study introduces 3D spherical metaparticles based on platonic solids to demonstrate and control spoof-plasmon scattering.

## Key findings

- 3D spherical metaparticles can replicate nanoscale behaviors at lower frequencies.
- Internal structure tuning significantly affects scattering behavior of the metaparticles.
- Effective medium models align with simulations and experiments on these structures.

## Abstract

Geometries that replicate the behavior of metal nanostructures
at much lower frequencies via texturing surfaces so they will support
a surface wave have been a central pillar of metamaterials research.
However, previous work has focused largely on geometries that can
be reduced to symmetries in one or two dimensions, such as strips,
flat planes, and cylinders. Shapes with isotropic responses in three
dimensions are important for applications, such as radar scattering
and the replication of certain nanoscale behaviors. This work presents
a detailed exploration of the scattering behavior of 3D spherical
“spoof plasmonic” metaparticles, based on the platonic
solids. Their behavior is compared to an effective medium model through
simulation and experiment, and the vast range of behaviors that can
be produced from a metal sphere of a given radius via tuning its internal
structure is explored in detail.