Fig. 3

Ellipsometric angles (\(\Psi\) and \(\Delta\)) for water as a reference medium for different gold film thicknesses and angles of incidence: (a-1) \(\Delta\) for 45 nm, (a-2) \(\Psi\) for 45 nm, (b-1) \(\Delta\) for 55 nm, (b-2) \(\Psi\) for 55 nm, (c-1) \(\Delta\) for 60 nm, (c-2) \(\Psi\) for 60 nm.