Observations and Calculations of Light Scattering from Clusters of Spheres

Abstract

Two-dimensional angular optical scattering (TAOS) from clusters of polystyrene latex spheres is measured in the near-forward and nearbackward directions. In both cases, the scattering pattern contains a rich and complicated structure due to the interaction and interference of the light among the primary particles. Calculations are made for aggregates similar to those generated experimentally that demonstrate the rich structure in the scattering pattern. A comparison of the experimental and theoretical TAOS gives good qualitative agreement.

Formation of Highly Ordered Spherical Aggregates from Drying Microdroplets of Colloidal Suspension

“…Some systematic studies on the influence of the various aggregation parameters on the morphology of the final structures have also been performed. 28,29 It is worth noticing, that in order to investigate nanoparticle aggregates, a variety of methods have been proposed, such as: static light scattering, 30,31 small-angle X-rays scattering, [32][33][34][35] dynamic light scattering (DLS), 36 TEM and SEM 12,37 as well as electron tomography method. 27,38 Particularly valuable are these, which provide real time analysis of colloidal assembly in situ, i.e.…”

Study on the light scattering of dust particles cluster

“…n I )II (3) k2r2(3 like the amplitude matrix, the phase matrices explicitly depend on 0-and q'-even when the incident or scattered light propagates along the z-axis. Explicit formulas for the elements of the Stokes phase matrix in terms of the amplitude matrix elements are given by [6] is complex for an absorptive medium and can be expressed as [7] £ =£r + i£i The FDTD results for S11 and S22 essentially converge to the Mie solutions.…”

“…With the advancement of science and technology, and the requirement of biomedicine and martial development, study on the scattering property of particles cluster [1] [2] [3], for example, extinction, scattering, and absorption cross section, has become the core of correlative field, such as, light scattering of interstellar dust in atmosphere, radar echo scattering and propagation of spatial object.…”

Optics of Biological Particles

“…These are diffraction rings of the inclusion, and their frequency increases with inclusion size. They are located on the side opposite to that of the inclusion, and are the result of the light refracted by the host surface and diffracted by the inclusion before exiting the host toward the side opposite the specular peak (Videen et al, 2000;Prabhu et al, 2001). These features have been measured experimentally from droplets containing inclusions (Bronk et al, 1993;Secker et al, 2000).…”

“…Kaye et al, 2000 2000 Using a camera lens in the Abbé sine condition, measured scattering patterns from spherical clusters that could be compared with theoretical calculations. Holler et al, 2000Holler et al, 2004 Captured simultaneous light scattering patterns over identical angular ranges from two laser sources. Aptowicz et al, 2004 …”