Dyakonov--Tamm waves localized to the planar interface of two chiral sculptured thin films

Jun Gao; Akhlesh Lakhtakia; Mingkai Lei

doi:10.1117/12.860073

23 August 2010 Dyakonov--Tamm waves localized to the planar interface of two chiral sculptured thin films

Jun Gao, Akhlesh Lakhtakia, Mingkai Lei

Proceedings Volume 7766, Nanostructured Thin Films III; 77660K (2010) https://doi.org/10.1117/12.860073
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

The Dyakonov-Tamm wave combines the features of the Dyakonov wave and the Tamm electronic state. Dyakonov-Tamm waves guided by the planar interface of two dissimilar chiral sculptured thin films (STFs) were systematically examined. The interfaces result from the chiral STFs being dissimilar in (a) orientation about the helical axis, (b) structural handedness, (c) structural period, (d) vapor incidence angle, (e) material, or (f) various combinations thereof. A boundary-value problem for the propagation of Dyakonov-Tamm waves was formulated and numerically solved. Up to three physical solutions were obtained for any specific combination of constitutive properties of the two chiral STFs. Each solution indicates the existence of a Dyakonov-Tamm wave. If more than one solutions exist, the corresponding Dyakonov-Tamm waves differ in phase speed and degree of localization to the interface.

Citation Download Citation

Jun Gao, Akhlesh Lakhtakia, and Mingkai Lei "Dyakonov--Tamm waves localized to the planar interface of two chiral sculptured thin films", Proc. SPIE 7766, Nanostructured Thin Films III, 77660K (23 August 2010); https://doi.org/10.1117/12.860073

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KEYWORDS

Interfaces

Oxides

Titanium

Wave propagation

Thin films

Tantalum

Waveguides

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