Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Poster: Organic-Inorganic Hybrid Systems and Organic Films
O 42.21: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster A
A versatile facility for time-resolved multidimensional spectroscopy of few-layer surface systems in a nanostructured environment — •Sebastian Pres1, Bernhard Huber1, Emanuel Wittmann2, Daniel Fersch1, Lysanne Dietrich1, Julian Lüttig1, Victor Lisinetskii1, Matthias Hensen1, Eberhard Riedle2, and Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Lehrstuhl für BioMolekulare Optik, Ludwig-Maximilians-Universität, Oettingenstraße 67, 80538 München, Germany
We present here a surface spectroscopy setup which combines aberration-corrected photoemission electron microscopy (AC-PEEM), enabling sub-5 nm spatial resolution, with a widely tunable highrepetition-rate (up to 1 MHz) laser source. Organic and inorganic few-layer systems can be directly prepared and characterized in-situ by low-energy electrons (LEEM, LEED) and ex-situ by scanning fluorescence microscopy. Tuning of the optical excitation from 900 nm down to 230 nm at sub-25 fs pulse duration allows a precise spectral addressability of sample specific resonances. The laser pulses, used in collinear time-interferometric scanning schemes like two-colour pump-probe techniques, reveal surface dynamics in 2D materials, e.g., WSe2. Further, the usage of amplitude- and phase-shaped pulse sequences permits the investigation of transport processes between and within individual molecules in organic-inorganic hybrid systems by space- and time-resolved multidimensional spectroscopy.