Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Poster II

MA 52.2: Poster

Donnerstag, 15. März 2018, 15:00–18:00, Poster C

Layout of a new experiment to measure ultrafast spin dynamics — •Marc Terschanski, Fabian Mertens, Stefano Ponzoni, Davide Bossini, and Mirko Cinchetti — Experimentelle Physik 6, TU Dortmund, Otto-Hahn-Straße 4, 44227 Dortmund

In this contribution, we will present the layout of a newly-established experimental setup for the ultrafast manipulation of the magnetic order in solids. The setup is based on a turn-key amplified laser system with a repetition rate up to 1 MHz. This system has an output of 20 W and pulses with femtosecond duration. Using two optical parametric amplifiers it is possible to tune the photon energy of both the pump and probe beam independently from 0.5 eV to 3.5 eV. The sample is positioned on a cryostat in a superconducting magnet allowing to cool down to 4 K and apply strong DC-magnetic (9 T) and electric fields.

Investigating ultrafast spin dynamics by detecting magneto-optical effects demands to measure rotation or ellipticity of the probe polarization. In this regard designing and building a balanced detection scheme operating up to 1 MHz and able to integrate the signal of single-pulses is one of the major challenges. Therefore we will present the layout of the setup with special attention given to the home build detector.