Topological Surface-plasmon-polaritons on Corrugated Metal-dielectric Surfaces

  title={Topological Surface-plasmon-polaritons on Corrugated Metal-dielectric Surfaces},
  author={Thomas Benjamin Smith and Coskun Kocabas and Alessandro Principi},
  journal={arXiv: Mesoscale and Nanoscale Physics},
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 Schrodinger-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… 
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