Hybridization of Singular Plasmons via Transformation Optics

TL;DR

This paper introduces a novel theoretical model combining plasmon hybridization and transformation optics to simplify the design of complex plasmonic nanostructures and metasurfaces with tunable resonance spectra.

Contribution

The authors develop an innovative model that reduces design complexity by controlling resonance features through geometric parameters, advancing plasmonic metamaterial design.

Findings

Efficient control of resonance spectra using few geometric parameters.

Design of metasurfaces with customizable absorption spectra.

Model enables intuitive manipulation of complex plasmonic patterns.

Abstract

Surface plasmon resonances of metallic nanostructures offer great opportunities to guide and manipulate light on the nanoscale. In the design of novel plasmonic devices, a central topic is to clarify the intricate relationship between the resonance spectrum and the geometry of the nanostructure. Despite the many advances, the design becomes quite challenging when the desired spectrum is highly complex. Here we develop a new theoretical model for surface plasmons of interacting nanoparticles to reduce the complexity of the design process significantly. Our model is developed by combining plasmon hybridization theory with transformation optics, which yields an efficient way of simultaneously controlling both global and local features of the resonance spectrum. As an application, we propose a design of metasurface whose absorption spectrum can be controlled over a large class of complex patterns through only a few geometric parameters in an intuitive way. Our approach provides fundamental tools for the effective design of plasmonic metamaterials with on-demand functionality.