Propagation of Surface Plasmon Polaritons in Thin Films of Topological Insulators

Abstract

The propagation of surface plasmon polaritons in thin films of topological insulators is studied. The materials considered are second generation three dimensional topological insulators Bi${}_2$Se${}_3$, Bi${}_2$Te${}_3$, and Sb${}_2$Te${}_3$. Dispersion relations and propagation lengths are estimated numerically, taking into account the variation of bulk dielectric functions of topological insulators as well as substrate using the Drude-Lorentz model. Key factors affecting propagation length are identified and ways to modify the dispersion relations are suggested. The explanation of the apparent discrepancy between the experimental data for Bi${}_2$Se${}_3$ and theory is proposed.

8 pages, 9 figures

References in corpus (4)

• Collective modes of the massless Dirac plasma
• Ultraviolet and visible range plasmonics of a topological insulator
• Ambipolar Surface State Thermoelectric Power of Topological Insulator Bi2Se3
• Multilayer graphene waveguides

Cited by in corpus (8)

• Plasmonics in topological insulators: Spin-charge separation, the influence of the inversion layer, and phonon-plasmon coupling
• Interaction of edge exciton polaritons with engineered defects in the van der Waals material Bi2Se3
• Controlling surface charge and spin density oscillations by Dirac plasmon interaction in thin topological insulators
• Surface plasmon-phonon-magnon polariton in a topological insulator-antiferromagnetic bilayer structure
• Phonon-mediated strong coupling between a three-dimensional topological insulator and a two-dimensional antiferromagnetic material
• Topological Surface-plasmon-polaritons on Corrugated Metal-dielectric Surfaces
• Real-space nanoimaging of THz polaritons in the topological insulator Bi2Se3
• Floquet-Weyl semimetals generated by an optically resonant interband-transition