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Topological Surface-plasmon-polaritons on Corrugated Metal-dielectric Surfaces | | Thomas Benjamin Smith
; Alessandro Principi
; | | Date: |
30 Jun 2020 | | Abstract: | We study topological surface-plasmon-polaritons at optical frequencies in
diffraction gratings formed by bipartite corrugated metal-dielectric gratings.
To do so we implement the theory as developed in Della Valle and Longhi to
describe the amplitude of the field by an emergent Schr"odinger-like equation.
The tri-harmonic grating generates a bipartite Kronig-Penney model.
Topologically protected localised modes are then predicted to occur at the
edges of the grating and at defects formed by the combination of two mirror
antisymmetric corrugations, whose bulk invariant is a step-wise varying Zak
phase in both cases. | | Source: | arXiv, 2007.0025 | | Services: | Forum | Review | PDF | Favorites | |
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