Paper
19 September 2013 An investigation into Voigt wave propagation for optical sensing
Author Affiliations +
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.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tom G. Mackay "An investigation into Voigt wave propagation for optical sensing", Proc. SPIE 8818, Nanostructured Thin Films VI, 88180A (19 September 2013); https://doi.org/10.1117/12.2023949
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KEYWORDS
Wave propagation

Particles

Dielectrics

Optical sensing

Refractive index

Anisotropy

Homogenization

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