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Optical response of a hematite coating: ellipsometry data versus Fourier-based computations
Abstract : The optical properties of a hematite-epoxy coating are predicted numerically and compared with el-lipsometry measurements. The highly-heterogeneous dispersion of nanocubic hematite particles in the epoxy resin is simulated using a previously developed two-scales random model. The local anisotropic permittivity tensor of hematite particles, and that of the epoxy, are estimated by ellipsometry measurements carried out on a macroscopic hematite and epoxy samples. Fourier-based methods using a "discrete" Green operator are used to treat complex permittivities. They predict the effective and local electric displacement field in the quasi-static approximation. The former is close to two estimates based on the Hashin-Shtrikman bounds and a self-consistent approximation. Good agreement is found between experimental data and FFT computations in the whole range of the visible spectrum.
Littérature citée [32 références]
https://hal-mines-paristech.archives-ouvertes.fr/hal-01232497
Contributeur : François Willot <>
Soumis le : lundi 23 novembre 2015 - 15:50:19
Dernière modification le : jeudi 24 septembre 2020 - 17:04:02
Archivage à long terme le : : mercredi 24 février 2016 - 13:10:27
Contributeur : François Willot <>
Soumis le : lundi 23 novembre 2015 - 15:50:19
Dernière modification le : jeudi 24 septembre 2020 - 17:04:02
Archivage à long terme le : : mercredi 24 février 2016 - 13:10:27
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