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Electromagnetic Scattering by Fully Ordered and Quasi-Random Rigid Particulate SamplesIn 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.
Document ID
20160012558
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mishchenko, Michael I.
(NASA Goddard Inst. for Space Studies New York, NY, United States)
Dlugach, Janna M.
(National Academy of Sciences of the Ukraine Kiev, Ukraine)
Mackowski, Daniel W.
(Auburn Univ. AL, United States)
Date Acquired
October 24, 2016
Publication Date
October 10, 2016
Publication Information
Publication: Journal of the Optical Society of America A
Publisher: The Optical Society
Volume: 33
Issue: 11
ISSN: 0030-3941
Subject Category
Optics
Report/Patent Number
GSFC-E-DAA-TN36385
Distribution Limits
Public
Copyright
Other
Keywords
Radiative transfer
Speckle
Random media
Paricles
T-matrix method
Polarization
Electomagnetic scattering

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