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Berlin 2018 – scientific programme

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O: Fachverband Oberflächenphysik

O 42: Poster: Organic-Inorganic Hybrid Systems and Organic Films

O 42.21: Poster

Tuesday, March 13, 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 Brixner11Institut 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.

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