Monte Carlo simulations of the polarization anisotropy in light backscattered from a fractal aggregation

Katsuhiro Ishii; Toshiaki Iwai; Toshimitsu Asakura

doi:10.1117/12.280292

18 August 1997 Monte Carlo simulations of the polarization anisotropy in light backscattered from a fractal aggregation

Katsuhiro Ishii, Toshiaki Iwai, Toshimitsu Asakura

Proceedings Volume 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II; (1997) https://doi.org/10.1117/12.280292
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

This report concerns with investigations on the spatial polarization anisotropy of a backscattered intensity pattern produced at a boundary plane between a scattering medium and surroundings under illumination of a focused laser beam. The investigations are conducted by means of Monte Carlo simulations based on a free pathlength distribution function of the fractal medium, a phase function of the Rayleigh-Debye scattering theory, and a negative-exponential decay of the propagating light by absorption. In this report, we demonstrate numerically the spatial polarization anisotropy of the intensity distribution produced at the boundary plane between the medium and the surroundings, a bow-tie intensity pattern for the co-polarization and a cloverleaf intensity pattern for the cross-polarization, and their dependence on the fractal dimension of the medium. Consequently, we can discuss the validity of our model and algorithm for the fractal medium as the scattering object by studying the dependences of the polarization properties of the multiply- backscattered light on the dimension, the scattering order, and the absorption in comparison with the case of the non- fractal medium.

Citation Download Citation

Katsuhiro Ishii, Toshiaki Iwai, and Toshimitsu Asakura "Monte Carlo simulations of the polarization anisotropy in light backscattered from a fractal aggregation", Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); https://doi.org/10.1117/12.280292

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