  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.
