Co-polarized and cross-polarized scattering of an off-axis focused Gaussian beam by a spherical particle. 2. Sum over azimuthal modes. (December 2018)

• Record Type: Journal Article
• Authors: Lock, James A.; Laven, Philip
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 221(2018)
• Page Start: 273
• Page End: 285
• Publication Date: 2018-12
• Subjects: Mie theory -- Generalized Lorenz–Mie theory -- Polarization-resolved scattering -- Cross-polarized scattering; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2018.08.028
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: Calculated polarization-resolved scattering of an off-axis Gaussian beam by a homogeneous spherical particle. Obtained an approximation to the scattering amplitudes away from forward and back-scattering for which the sum over azimuthal waves can be evaluated analytically. Obtained an approximation to the scattering amplitudes near forward and back-scattering for which the sum over azimuthal waves can be evaluated analytically. Abstract: In static and dynamic light scattering, it has frequently been claimed that cross-polarized scattering cannot occur for single-scattering by a homogeneous spherical particle. Although this is true for both plane wave and on-axis Gaussian beam incidence, it does occur when the beam is translated off-axis incidence perpendicular to the scattering plane. An approximation to the co-polarized and cross-polarized scattering amplitudes is developed for which the sums over azimuthal modes can be evaluated analytically. This approximation provides a close fit to the exact generalized Lorenz–Mie polarization-resolved intensity for a number of off-axis locations of the incident beam.