Unfortunately one usually does not have the optical properties of the sample and the
thin films. Therefore one would need to perform a measurement to obtain these
values which can be done for example via a so called Kramers – Kronig
Transformation [10 – 12]. However, also this method is limited as very pure samples
in form of a powder with an average particle size smaller than the wavelength
of the light used is needed. Due to this reason no simulation of the spectra shown
here could be done.