Influence of Particle Shape on Polarization Characteristics of Backscattering Light in Turbid Media
Chinese Journal of Lasers
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The polarization characteristics of the polarized light propagating in a turbid medium are of considerable importance in various polarization-related technologies. Here, a light propagation model is established for a turbid medium comprising randomly oriented non-spherical particles. Further, the polarization characteristics of the backscattering light after multiple scattering are numerically evaluated for a turbid medium comprising different non-spherical particles based on the T-matrix method and the vector Monte Carlo simulations. During this process, the medium is categorized as a Rayleigh-scattering-particle medium or a Mie-scattering-particle medium based on the non-spherical particle size in the medium. The results show that in the Rayleigh-scattering-particle medium, the influence of particle shape on the polarization characteristics of the backscattering light of the linearly-polarized light and circularly-polarized light is considerably small, the polarization preservation ability of the linearly-polarized light is better than that of the circularly-polarized light, and the linearly-polarized direction is maintained, whereas the circularly-polarized rotation is reversed. Conversely, in the Mie-scattering-particle medium, the different particle shapes considerably affect the polarization characteristics of the backscattering light; the polarization preservation ability of the circularly-polarized light is better than that of the linearly-polarized light at large optical thicknesses, and the opposite is true at small optical thicknesses. Furthermore, the particle shapes significantly influence the spatial distribution of the polarization degree and backscattering intensity of the polarized light.
Scattering; Non-spherical; Vector Monte Carlo; T-matrix method; Polarization
Electromagnetics and Photonics | Mechanical Engineering
Influence of Particle Shape on Polarization Characteristics of Backscattering Light in Turbid Media.
Chinese Journal of Lasers, 47(1),