Es. Zubko et al., Light scattering by composite particles comparable with wavelength and their approximation by systems of spheres, OPT SPECTRO, 91(2), 2001, pp. 273-277
Scattering properties of an ensemble of independent, randomly-oriented syst
ems consisting of two contacting wavelength-sized dielectric particles of s
pherical and random shapes are studied. The optical properties of such ense
mbles are shown to be determined, to a considerable degree, by the properti
es of individual components of the system; the role of collective effects i
s insignificant. For large scattering angles, systems consisting of two sph
eres form the negative branch of the degree of linear polarization when an
individual sphere also forms it, and when systems composed of equivalent pa
rticles of random shape do not exhibit the negative branch. The conclusion
is made that the modeling of the scattering properties of aspherical and ag
gregate particles by using systems of spheres of size of the order of the o
ptical wavelength is inadequate. (C) 2001 MAIK "Nauka/Interiodica".