Rigorous 3-D vectorial complex ray model applied to light scattering by an arbitrary spheroid

Abstract : After a ray bundle passes a curved surface, the equal-phase wavefront associated with the refracted rays will be distorted. Consequently, the cross-section of a ray bundle with a curved wavefront during propagation in a homogeneous medium will vary with the ray-bundle propagation distance. Moreover, the phase of a ray bundle with convergent wavefront will undergo a phase shift of pi/2 with each passage of a focal line. The contribution to the scattering amplitude by a ray bundle after passing a scatterer is determined by three elements: the cross-section variation of its wavefront, the total phase, and the refraction coefficients determined by Fresnel equations. In the geometric optics regime, the aforesaid three elements caused by a curved surface can be systematically quantified in terms of the vectorial complex ray-tracing technique. In this study, rigorous vectorial complex ray-tracing calculations are conducted for light scattering by a general spheroid and the results are validated in comparison with the benchmarks provided by the rigorous T-matrix method. (C) 2016 Elsevier Ltd. All rights reserved.
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Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2016, 179, pp.1--10. 〈10.1016/j.jqsrt.2016.03.010〉
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Soumis le : jeudi 5 octobre 2017 - 15:36:58
Dernière modification le : samedi 27 octobre 2018 - 01:23:29

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Bingqiang Sun, George W. Kattawar, Ping Yang, Kuan Fang Ren. Rigorous 3-D vectorial complex ray model applied to light scattering by an arbitrary spheroid. Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2016, 179, pp.1--10. 〈10.1016/j.jqsrt.2016.03.010〉. 〈hal-01611247〉

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