Manipulating Topological Valley Modes in Plasmonic Metasurfaces

Abstract

The coupled light-matter modes supported by plasmonic metasurfaces can be combined with topological principles to yield subwavelength topological valley states of light. We give a systematic presentation of the topological valley states available for lattices of metallic nanoparticles: All possible lattices with hexagonal symmetry are considered, as well as valley states emerging on a square lattice. Several unique effects which have yet to be explored in plasmonics are identified, such as robust guiding, filtering and splitting of modes, as well as dual-band effects. We demonstrate these by means of scattering computations based on the coupled dipole method that encompass the full electromagnetic interactions between nanoparticles.

arXiv comment10 pages, 9 figures

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Cited by in corpus (6)

• A brief review of topological photonics in one, two, and three dimensions
• Higher-order topology in plasmonic kagome lattices
• Experimental observations of topologically guided water waves within non-hexagonal structures
• Tunable three-way valley Hall energy-splitter: venturing beyond graphene-like structures
• Near- and Far-Field Excitation of Topological Plasmonic Metasurfaces
• Canonical scattering problem in topological metamaterials: Valley-Hall modes through a bend