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.
Cite
@article{arxiv.1909.12742,
title = {Manipulating Topological Valley Modes in Plasmonic Metasurfaces},
author = {Matthew Proctor and Paloma A. Huidobro and Stefan A. Maier and Richard V. Craster and Mehul P. Makwana},
journal= {arXiv preprint arXiv:1909.12742},
year = {2020}
}
Comments
10 pages, 9 figures