A remote-sensing method for sub-wavelength grains on planetary surfaces by optical polarimetry

Details A remote-sensing method for sub-wavelength grains on planetary surfaces by optical polarimetry A remote-sensing method for sub-wavelength grains on planetary surfaces by optical polarimetry

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.245...46g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 245, July 1, 1990, p. 46-55.

Astronomy and Astrophysics

Astronomy

25

Granular Materials, Optical Polarization, Planetary Surfaces, Polarimetry, Remote Sensing, Wavelengths, Albedo, Diffraction, Linear Polarization, Powder (Particles), Powdered Aluminum, Surface Roughness

Scientific paper

Some optical polarization effects for very fine powders are shown. The well-known curve of polarization versus phase angle is found to change in shape and scale when the grain size is reduced to less than the wavelength; strong negative polarization is found, even for a smooth powder surface of high albedo. The negative peak changes in shape, and its parameters are found to be related to grain size in simple ways. This distinctive shape provides a possible remote-sensing method for detecting subwavelength grains on planetary surfaces.

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