2020
DOI: 10.48550/arxiv.2007.00025
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Topological Surface-plasmon-polaritons on Corrugated Metal-dielectric Surfaces

Thomas Benjamin Smith,
Coskun Kocabas,
Alessandro Principi

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 1 to describe the amplitude of the field by an emergent Schrödinger-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… Show more

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