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2021
ACL
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T.Guerra, D.De Sousa Meneses, O.Rozenbaum, C.Blanchard, 'From representative volume element of interacting particles to the extraction of their effective properties', Opt. Express 29 35900 (2021) doi:10.1364/oe.438451
The main concern of this investigation was the relation between the representative
volume element of the scattered flux from 2D random agglomerates, composed of sub-wavelength
interacting particles, and the extraction of their effective electromagnetic properties. Using a
constant ratio between agglomerates radius and wavelength, behaviors of the scattered flux mean
value and standard deviation were studied as a function of the agglomerate surface, in the case
of relevant particle permittivities. Using the mean or standard deviation functions, two criteria
for homogenization were derived. Compared to the extraction of the effective refractive index,
both criteria failed to predict the minimal surface needed for homogenization, questioning the
existence of a link between the accuracy of the scattered flux evaluation and homogenization.
However, it is shown that when no surface-plasmon resonances are excited, a single minimal
representative surface for homogenization can be defined.
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