Stokes parameters, ellipsometric

The Stokes parameters are related to the ellipsometric parameters as follows ... 

Thus, the Stokes parameters are equivalent to the ellipsometric parameters although less easily visualized, they are operationally defined in terms of measurable quantities (irradiances). Additional advantages of the Stokes parameters will become evident as we proceed. Note that Q and U depend on the choice of horizontal and vertical directions. If the basis vectors 0 ( and , ... 

Now the state of polarization of the reflected radiation can be determined completely and specified by the coordinates on a Poincar6 sphere or by the full set of four Stokes parameters s (cf. Sec. 3.2) the latter are related to the ellipsometric parameters by... 

In this section we show how the Stokes parameters can be used to derive the ellipsometric characteristics of the plane electromagnetic wave given by Eq. (7.1). Writing... 

The polarization characteristics of the incident field can also be described by the coherency and Stokes vectors. Although the ellipsometric parameters completely specify the polarization state of a monochromatic wave, they are difEcult to measure directly (with the exception of the intensity Eq). In contrast, the Stokes parameters are measurable quantities and are of greater usefulness in scattering problems. The coherency vector is defined as... 

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