Stokes parameters

https://doi.org/10.1351/goldbook.S06030
Of elliptically polarized incident radiation, these are given by s00=E10+E20 s10=E10E20 s20=2 E10 E20 cosδ0 s30=2 E10 E20 sinδ0 where E10 and E20 specify the irradiances of the incident light polarized with their electric vectors vibrating perpendicular and parallel to the scattering, respectively and δ0 is the phase difference between these electric vectors.
Source:
PAC, 1983, 55, 931. (Definitions, terminology and symbols in colloid and surface chemistry. Part 1.14: Light scattering (Provisional)) on page 933 [Terms] [Paper]