Complex reflection coefficient, definition

In Figure 10.1, the electric vectors of the incident and reflected rays on the metal surface are shown as illustrated, the electric vector of the reflected ray for the s-wave always has a phase shift of about -180 from that of the incident ray (effectively creating a node at the metal surface), whereas the phase shift for the reflected p-wave depends on the angle of incidence as described below. The definition of the phase shift follows established practice [1,4-6]. In Figure 10.2, the amplitude of the reflection coefficients (p, p ) and phase shifts (Tj, Tp) calculated by the Fresnel equations for the radiation reflected from a metal surface are shown. The definition of the phase shifts in this figure is the same as those shown in Figure 10.1. For this calculation, the complex refractive-index values of gold (n = 15.9... 

For a general situation of optical anisotropy and sample orientation, the simple definition of p in Equation 13 is no longer a complete description, and the generalized ellipsometry approach is needed. In such instances. Equation 13 depends on the polarization state of the incident plane wave. The generalized elKpsometry parameters are then described by three ratios of the polarized-light reflection coefficients among the four available complex-valued elements of the Jones reflection matrix r [15, 36] ... 

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