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Asymmetries in surface waves and reflection/transmission characteristics associated with topological insulators
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Paper Abstract

Three numerical studies were undertaken involving the interactions of plane waves with topological insulators. In each study, the topologically insulating surface states of the topological insulator were represented through a surface admittance. Canonical boundary-value problems were solved for the following cases: (i) Dyakonov surface-wave propagation guided by the planar interface of a columnar thin film and an isotropic dielectric topological insulator; (ii) Dyakonov–Tamm surface-wave propagation guided by the planar interface of a structurally chiral material and an isotropic dielectric topological insulator; and (iii) reflection and transmission due to the planar interface of a topologically insulating columnar thin film and vacuum. The nonzero surface admittance resulted in asymmetries in the wave speeds and decay constants of the surface waves in studies (i) and (ii). The nonzero surface admittance resulted in asymmetries in the reflectances and transmittances in study (iii).

Paper Details

Date Published: 30 August 2017
PDF: 6 pages
Proc. SPIE 10356, Nanostructured Thin Films X, 103560H (30 August 2017); doi: 10.1117/12.2271940
Show Author Affiliations
Tom G. Mackay, Univ. of Edinburgh (United Kingdom)
Pennsylvania State Univ. (United States)
Francesco Chiadini, Univ. of Salerno (Italy)
Vincenzo Fiumara, Univ. of Basilicata (Italy)
Antonio Scaglione, Univ. of Salerno (Italy)
Akhlesh Lakhtakia, Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 10356:
Nanostructured Thin Films X
Yi-Jun Jen; Akhlesh Lakhtakia; Tom G. Mackay, Editor(s)

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