Polarization of Light Scattered by Surfaces with Complex Microstructure at Phase Angles 0.1°-3.5°

Details Polarization of Light Scattered by Surfaces with Complex Microstructure at Phase Angles 0.1°-3.5° Polarization of Light Scattered by Surfaces with Complex Microstructure at Phase Angles 0.1°-3.5°

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002sosyr..36...62s&link_type=abstract

Solar System Research, v. 36, Issue 1, p. 62-67 (2002).

Computer Science

1

Scientific paper

We present laboratory measurements of the phase dependences of linear polarization for surfaces with a complex microstructure in the range of phase angles 0.1°-3.5° A sample of freshly fallen snow (with particle sizes of about 50 × 500 μm) exhibits a nearly zero polarization. Surfaces with submicron structure show a narrow branch of negative polarization at small phase angles, irrespective of whether the surface is powderlike or solid with microcrystalline structure. This polarization is similar to that exhibited by Jupiter's satellites. The negative polarization branch becomes deeper with decreasing porosity of light dielectric surfaces. At the phase angles between 0.5° and 3.0°, the polarization for quartz powder with 10-μm particles is almost constant. The polarization for light dielectric surfaces depends on the geometry of illumination and observation. An inclination of the surface in the scattering plane produces a parallel shift of the negative polarization branch toward large values of the polarization modulus. The same inclination in a perpendicular direction produces the same shift toward positive degrees of polarization.

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