Core-shell nanospheres under visible light: Optimal absorption, scattering, and cloaking

摘要

Discovering peak-performing components, under certain structural and material constraints, is vital for the efficient operation of integrated systems that incorporate them. This becomes feasible by comprehensive scanning of the parametric space for one of the simplest classes of three-dimensional particles used in visible-light metasurface applications: the core-shell nanosphere. For each combination of actual media picked from a long list, the highest-scoring nanoparticles in terms of absorbance, scattering, and cloaking are recorded, while their near-field visualizations unveil the resonance mechanisms that make them so special. The reported results offer additional degrees of freedom in modeling collective meta-atom interactions and contribute to the photonic inverse design by providing the upper limits in the performance for particles of a basic geometry.