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arXiv · 1601.05026

Propagation of Surface Plasmon Polaritons in Thin Films of Topological Insulators

Yury Deshko·Lia Krusin-Elbaum·Vinod Menon·Alexander Khanikaev·Jacob Trevino
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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.

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Yury Deshko, Lia Krusin-Elbaum, Vinod Menon, Alexander Khanikaev, Jacob Trevino. 2016-01-19. Propagation of Surface Plasmon Polaritons in Thin Films of Topological Insulators. https://doi.org/10.1364/oe.24.007398

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