Dependence of extinction cross-section on incident polarization state and particle orientation

作者：Yang Ping^*; Wendisch Manfred; Bi Lei; Kattawar George; Mishchenko Michael; Hu Yongxiang

来源：Journal of Quantitative Spectroscopy and Radiative Transfer, 2011, 112(12): 2035-2039.

DOI：10.1016/j.jqsrt.2011.04.012

• Extinction
• Polarization
• Ice crystal
• Orientation

This note reports on the effects of the polarization state of an incident quasi-monochromatic parallel beam of radiation and the orientation of a hexagonal ice particle with respect to the incident direction on the extinction process. When the incident beam is aligned with the six-fold rotational symmetry axis, the extinction is independent of the polarization state of the incident light. For other orientations, the extinction cross-section for linearly polarized light can be either larger or smaller than its counterpart for an unpolarized incident beam. Therefore, the attenuation of a quasi-monochromatic radiation beam by an ice cloud depends on the polarization state of the beam if ice crystals within the cloud are not randomly oriented. Furthermore, a case study of the extinction of light by a quartz particle is also presented to illustrate the dependence of the extinction cross-section on the polarization state of the incident light.

• 出版日期2011-8