Multi-Layered Plasmonic Covers for Comb-Like Scattering Response and Optical Tagging

TL;DR

This paper explores multilayered plasmonic particles to create customizable optical scattering responses, including comb-like and super-scattering states, with robustness suitable for optical tagging applications.

Contribution

It introduces a novel multilayered plasmonic design that achieves tailored scattering responses and robust super-scattering states, advancing optical tagging technology.

Findings

Achieved ultrasharp comb-like scattering responses.

Realized strong super-scattering states close to invisible states.

Demonstrated robustness to material losses and background variations.

Abstract

We discuss the potential of multilayered plasmonic particles to tailor the optical scattering response. The interplay of plasmons localized in thin stacked shells realizes peculiar degenerate cloaking and resonant states occurring at arbitrarily close frequencies. These concepts are applied to realize ultrasharp comb-like scattering responses and synthesize staggered, ideally strong super-scattering states closely coupled to invisible states. We demonstrate robustness to material losses and to variations in the background medium, properties that make these structures ideal for optical tagging.