Ellipsometry in the sub-monolayer region

Optical anisotropy of Ge(001)2 × 1

“…This exposure changes the surface layer. Following Bootsma and Meyer [18] we will assume that this surface state layer is completely replaced by a thin optically transparent germanium oxide layer. In addition we also assume it to be isotropic.…”

“…We determined the optical anisotropy change because an absolute optical measurement in UHV environment is not easy to perform. In our interpretation we will make the usual assumption, provided by Bootsma and Meyer [18] and consider the germanium oxide layer as optically isotropic. The experimental data will be analyzed qualitatively within the continuous model.…”

Ellipsometric Ex-Situ study of fluorescent oligoperoxide nanolayers with europium complexes adsorbed on a glass surface. Formation and structureThe matrix model of vortex-beam quadrefringence in a uniaxial crystal

“…Therefore the ellipsometric technique allows for estimating the density of macromolecules packed on the solid surface. One can calculate the volume fraction of the polymer in heterogeneous surface layer using the effective-medium theory by Maxwell-Garnett [11,12] V n n n n q V n n n n…”

Kinetics of the formation and structure of oligoperoxide nanolayers and grafted polymer brushes on glass plate surface

“…Ellipsometrical measurements in monoand sub-monolayer region need very accurate information on structure of the substrate surface. Insignificant errors in determination of the substrate parameters can cause sizeable errors in parameters of surface layer [14][15][16][17]. In order to study the surface structure and optical parame- ters of substrates the preliminary ellipsometrical measurements were performed.…”

“…Therefore, density of the macromolecule distribution on the solid surface can be estimated using this value. The volume fraction of polymer in heterogeneous surface layer can be calculated using the Maxwell-Garnett theory [14,15]: where V is the volume of the polymer substance, V is the total volume of the surface heterogeneous film, is the refractive index of surface film obtained from ellipsometrical measurements, is the refractive index of the bulk polymer material obtained from refractometric measurements, is the refractive index of ambient medium (solvent or air).…”