Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 45: Organic-Inorganic Hybrid Systems and Organic Films
O 45.4: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1A
A monolithic setup for preparation of thin films and time-resolved multidimensional spectroscopy at the nanoscale — •Sebastian Pres1, Bernhard Huber1, Emanuel Wittmann2, 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 a versatile experimental setup for preparing thin organic and inorganic films which can be characterized by low energy electrons (LEEM, LEED). To investigate the nature of energy transport processes between individual molecules or inside large heterogeneous structures, we want to combine the femtosecond time resolution of coherent 2D spectroscopy with nanoscale selectivity: Instead of measuring optical diffraction-limited light fields, we detect photoemitted electrons with spatial resolution <10 nm using aberration-corrected photoemission electron microscopy (AC-PEEM). The sub-30 fs optical excitation is generated by a two-branch noncollinear optical parametric amplifier (NOPA) featuring wide spectral tunability from the NIR to the UV range at repetition rate up to 1 MHz. Here we demonstrate the tunability of the laser system from 230 nm - 900 nm at simultaneously high pulse compressibility down to 20 fs. Using collinear four-pulse sequences we want to explore well-defined organic-inorganic hybrid systems by time-resolved multidimensional spectroscopy.