Manipulating topological valley modes in plasmonic metasurfaces

Proctor, Matthew; Huidobro, Paloma A.; Maier, Stefan A.; Craster, Richard V. und Makwana, Mehul P. (2020): Manipulating topological valley modes in plasmonic metasurfaces. In: Nanophotonics, Bd. 9, Nr. 3: S. 657-665

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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2192-8606
• Sprache: Englisch