THz transmission and resistively detected resonances in III-V semiconductors

This thesis is mostly dedicated to performing IR spectroscopy in large magnetic fields using high-intensity radiation from free electron lasers at HFML-FELIX, Nijmegen. IR spectroscopy is a powerful tool to investigate the electronic properties of semiconductors, as one can directly extract the THz conductivity from the dielectric response of the material, i.e. the transmittance. Additionally, one can excite various excitations that range from cyclotron, impurity cyclotron, spin as well as phonon-assisted resonances, which give valuable information about the effective mass, impurity states, effective g-factor and phonon modes, respectively.