title: Step-scan time-domain terahertz magneto-spectroscopy.
abstract: We present a novel approach for terahertz time-domain spectroscopy of magneto-optic phenomena. The setup used in this work combines a tabletop pulsed magnet and a standard terahertz time-domain spectroscopy system. The approach is based on repetitive operation of the pulsed magnet and step-wise increment of the delay time of the time-domain spectroscopy system. The method is demonstrated by plotting the magneto-transmission spectra of linearly polarized THz pulses through the hole gas of a Ge sample and the electron gas of GaAs, InSb and InAs samples. Cyclotron resonance spectra are displayed in the frequency range from 200 GHz to 2 THz and for a magnetic field up to 6 T. The GaAs spectra are analyzed in more detail using simulations based on the Drude model.
authors.affiliation: Fraunhofer Institute for Physical Measurement Techniques IPM, Department of Terahertz Measurement and Systems, Erwin-Schroedinger-Str., Building 56, 67663 Kaiserslautern, Germany. daniel.molter@ipm.fraunhofer.de
authors.forename: D
authors.initials: D
authors.lastname: Molter
authors.forename: G
authors.initials: G
authors.lastname: Torosyan
authors.forename: G
authors.initials: G
authors.lastname: Ballon
authors.forename: L
authors.initials: L
authors.lastname: Drigo
authors.forename: R
authors.initials: R
authors.lastname: Beigang
authors.forename: J
authors.initials: J
authors.lastname: Léotin
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D059346:Magnets; D055068:Terahertz Spectroscopy