Hannover 2016 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 11: Posters 2: Novelties in Molecular Physics: Femtosecond Spectroscopy, Quantum Control, Electronic Spectroscopy, Biomolecules and Photochemistry

MO 11.19: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

A setup for time- and frequency resolved kinetic terahertz absorption spectroscopy using temperature jumps — •Claudius Hoberg — Ruhr-Universität Bochum

The constant rearrangement of hydrogen bonds in the water network occurs on picosecond timescales having their spectral signatures in the THz frequencies. Solvents like salts and biomolecules are known to alter these picosecond motions of the hydrogen bond network. By using temperature jumps we induce non-equilibrium conditions in samples and monitor the kinetic response of the hydrogen bond network. The time-domain THz setup utilizes direct digitization of signals, rapid scanning techniques together with a temperature controlled sample cell. The setup provides a time resolution of 0.5 µ s in the spectral range between 0.3 and 2.5 THz and a dynamic range of about 70 dB.