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Propagation of Surface Plasmon Polaritons in Thin Films of Topological Insulators
Yury Deshko, Lia Krusin-Elbaum, Vinod Menon, Alexander Khanikaev, Jacob Trevino
Jan 20 2016 cond-mat.mes-hall arXiv:1601.05026v2

@misc{1601.05026, author = {Yury Deshko and Lia Krusin-Elbaum and Vinod Menon and Alexander Khanikaev and Jacob Trevino}, title = {{P}ropagation of {S}urface {P}lasmon {P}olaritons in {T}hin {F}ilms of {T}opological {I}nsulators}, year = {2016}, eprint = {1601.05026}, note = {arXiv:1601.05026v2} }
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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.