Exceptional Points in three-dimensional Nanostructures

TL;DR

This paper demonstrates the existence of exceptional points in three-dimensional plasmonic nanostructures, enabling new avenues for enhanced light-matter interactions and advanced applications in communication, sensing, and imaging.

Contribution

It provides experimental evidence and a systematic method to realize exceptional points in 3D nanostructures through mode control and symmetry considerations.

Findings

Evidence of EPs in 3D plasmonic nanostructures

Controlled tuning of modes to reach EPs

Potential for enhanced light-matter interactions

Abstract

Exceptional points (EPs) are degeneracies in open wave systems where at least two energy levels and their corresponding eigenstates coalesce. We report evidence of the existence of EPs in 3D plasmonic nanostructures. The systems are composed of coupled plasmonic nanoresonators and can be judiciously and systematically driven to EPs by controlling symmetry-compatible modes via their near-field and far-field interactions. The proposed platform opens the way to the investigation of EPs for enhanced light-matter interactions and applications in communication, sensing and imaging.