Negative polarization of light at backscattering from a numerical analog of planetary regoliths

被引：4

作者：

Grynko, Yevgen ^{[1
]}

Shkuratov, Yuriy ^{[2
]}

Alhaddad, Samer ^{[1
]}

Forstner, Jens ^{[1
]}

机构：

[1] Paderborn Univ, Dept Theoret Elect Engn, Warburger Str 100, D-33102 Paderborn, Germany

[2] Kharkov Natl Univ, Inst Astron, Sumska Str 35, Kharkiv 61022, Ukraine

来源：

ICARUS | 2022年 / 384卷

关键词：

Light backscattering; Linear polarization; Regolith; SEMITRANSPARENT PARTICLES; BIDIRECTIONAL REFLECTANCE; LABORATORY SIMULATIONS; PARTICULATE SURFACES; OPTICS APPROXIMATION; SCATTERING; POLARIMETRY; SPECTROSCOPY; PHOTOMETRY; INTENSITY;

D O I：

10.1016/j.icarus.2022.115099

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We model negative polarization, which is observed for planetary regoliths at backscattering, solving a full wave problem of light scattering with a numerically exact Discontinuous Galerkin Time Domain (DGTD) method. Pieces of layers with the bulk packing density of particles close to 0.5 are used. The model particles are highly absorbing and have irregular shapes and sizes larger than the wavelength of light. This represents a realistic analog of low-albedo planetary regoliths. Our simulations confirm coherent backscattering mechanism of the origin of negative polarization. We show that angular profiles of polarization are stabilized if the number of particles in a layer piece becomes larger than ten. This allows application of our approach to the negative polarization modeling for planetary regoliths.

引用

页数：6

共 50 条

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