Demonstration and Control of “Spoof-Plasmon” Scattering from 3D Spherical Metaparticles
Alexander W. Powell, Thomas E. Whittaker, William G. Whittow, J. Roy Sambles, Alastair P. Hibbins
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.
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…
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Taxonomy
TopicsMetamaterials and Metasurfaces Applications · Plasmonic and Surface Plasmon Research · Advanced Antenna and Metasurface Technologies