An analysis is made of the vector properties of light scattered from small particles (the diameters are assumed comparable to a wavelength of the illumination) illuminated by two or more coherent beams. The results show that the polarization of the scattered light depends on both the polarization of the incident illumination and the scattered-light observation angle. Scattered light from orthogonally polarized illumination beams can interfere. The limits of applicability of current interference models of the scattering processes observed with laser interferometers used to determine Doppler shifts from moving particles are determined.
W. M. Farmer, "Scattering from small particles illuInated by coherent beams: Polarization properties," J. Opt. Soc. Am. 63, 1563-1570 (1973)