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

Tom G. Mackay; Francesco Chiadini; Vincenzo Fiumara; Antonio Scaglione; Akhlesh Lakhtakia

doi:10.1117/12.2271940

30 August 2017 Asymmetries in surface waves and reflection/transmission characteristics associated with topological insulators

Tom G. Mackay, Francesco Chiadini, Vincenzo Fiumara, Antonio Scaglione, Akhlesh Lakhtakia

Author Affiliations +

Proceedings Volume 10356, Nanostructured Thin Films X; 103560H (2017) https://doi.org/10.1117/12.2271940
Event: SPIE Nanoscience + Engineering, 2017, San Diego, California, United States

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).

Citation Download Citation

Tom G. Mackay, Francesco Chiadini, Vincenzo Fiumara, Antonio Scaglione, and Akhlesh Lakhtakia "Asymmetries in surface waves and reflection/transmission characteristics associated with topological insulators", Proc. SPIE 10356, Nanostructured Thin Films X, 103560H (30 August 2017); https://doi.org/10.1117/12.2271940

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