Fourier-Transform-Infrared-Spectroscopy on Solids
Supervisor: n.n.
The Fourier-Transform Spectroscopy is a fundamental
spectroscopic method. The measurement method of this
experiment is introduced with the help of investigations in
the infrared spectral region. The most important component of
the infrared spectrometer is the Michelson Interferometer.
Using specific measurements the mathematical basics and the
measuring method of the Fourier-Transform-Infrared (FTIR)
Spectroscopy are investigated, e.g. the connection between the
intensity spectrum and the interferogram as well as the
dependence of the resolving power on the optical path.
With the aid of these findings the local lattice modes of
oxygen in Si:O and of nitrogen in GaNAs are investigated and
calculated using a simple theoretical model.
As an additional task the reflectivity of a GaNAs sample is to be determined by experiment and by calculations.
- Basics of Fourier transformation and FTIR spectroscopy
- Dielectric function, optical constants and lattice vibrations
- Experimental determination and calculation of the frequencies of local lattice modes
The FTIR spectrometer IFS 48 used in this experiment is a perpetual loan of the Bruker Optik GmbH.