ArticleNature materials2022
Tomographic measurement of dielectric tensors at optical frequency.
Article in Nature materials, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed.
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- Neural networks determination of material elastic constants and structures in nematic complex fluids.Scientific reports · 2023Article
- 3D differential interference contrast microscopy using polarisation-sensitive tomographic diffraction microscopy.Journal of microscopy · 2023Article
- Multimodal image reconstruction from tomographic diffraction microscopy data.Journal of microscopy · 2022Article
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9 authors.
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Abstract
The dielectric tensor is a physical descriptor of fundamental light-matter interactions, characterizing anisotropic materials with principal refractive indices and optic axes. Despite its importance in scientific and industrial applications ranging from material science to soft matter physics, the direct measurement of the three-dimensional dielectric tensor has been limited by the vectorial and inhomogeneous nature of light scattering from anisotropic materials. Here, we present a dielectric tensor tomographic approach to directly measure dielectric tensors of anisotropic structures including the spatial variations of principal refractive indices and directors. The anisotropic structure is illuminated with a polarized plane wave with various angles and polarization states. Then, the scattered fields are holographically measured and converted into vectorial diffracted field components. Finally, by inversely solving a vectorial wave equation, the three-dimensional dielectric tensor is reconstructed. Using this approach, we demonstrate quantitative tomographic measurements of various nematic liquid-crystal structures and their fast three-dimensional non-equilibrium dynamics.
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