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Proceedings Paper

An investigation into Voigt wave propagation for optical sensing
Author(s): Tom G. Mackay
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Paper Abstract

In the nonsingular case of optical propagation in a linear, homogeneous, anisotropic, dielectric material, two independent plane waves, with orthogonal polarizations and different phase speeds, can propagate in a given direction. However, in certain dissipative biaxial materials there are particular directions along which these two waves coalesce to form a single plane wave. This coalescent Voigt wave represents the singular case. Most conspicuously, the amplitude of Voigt waves are linearly dependent upon propagation direction. A porous nanostructured thin film which supports Voigt wave propagation was investigated, with a view to possible optical sensing applications. The directions along which Voigt waves propagate can be highly sensitive to the refractive index of a fluid which infiltrates this porous material. Indeed, in our theoretical studies sensitivities which compare favourably to those of surface-plasmon-polariton-based optical sensors were found.

Paper Details

Date Published: 19 September 2013
PDF: 9 pages
Proc. SPIE 8818, Nanostructured Thin Films VI, 88180A (19 September 2013); doi: 10.1117/12.2023949
Show Author Affiliations
Tom G. Mackay, The Univ. of Edinburgh (United Kingdom)
The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 8818:
Nanostructured Thin Films VI
Tom G. Mackay; Akhlesh Lakhtakia; Yi-Jun Jen; Motofumi Suzuki, Editor(s)

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