AI Article Synopsis
- The study investigates how a rigid particulate sample can optically mimic a random medium when the particles move relative to each other.
- The authors used a precise superposition T-matrix method to evaluate the scattering behaviors of both ordered and quasi-randomly arranged particle groups in different orientations.
- They concluded that simply averaging optical measurements over a rigid sample is not enough; a quasi-random arrangement of particles is necessary to replicate specific scattering effects seen in true random media.
Article Abstract
In this paper we have analyzed circumstances under which a rigid particulate sample can behave optically as a true discrete random medium consisting of particles randomly moving relative to each other during measurement. To this end, we applied the numerically exact superposition T-matrix method to model far-field scattering characteristics of fully ordered and quasi-randomly arranged rigid multiparticle groups in fixed and random orientations. We have shown that, in and of itself, averaging optical observables over movements of a rigid sample as a whole is insufficient unless it is combined with a quasi-random arrangement of the constituent particles in the sample. Otherwise, certain scattering effects typical of discrete random media (including some manifestations of coherent backscattering) may not be accurately replicated.
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| http://dx.doi.org/10.1364/JOSAA.33.002144 | DOI Listing |
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