Manipulating topological valley modes in plasmonic metasurfaces

Matthew Proctor, Paloma A. Huidobro, Stefan A. Maier, Richard V. Craster, Mehul P. Makwana

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

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

Original languageEnglish
Number of pages9
JournalNanophotonics
Volume9
Issue number3
DOIs
Publication statusPublished - 4 Feb 2020
Externally publishedYes

Keywords

  • metal nanoparticles
  • plasmonic metasurface
  • topological nanophotonics
  • topological plasmonics
  • topological valley modes

Cite this