Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 46: Poster Tuesday: Plasmonics and Nanooptics
O 46.8: Poster
Dienstag, 2. April 2019, 18:00–20:00, Poster D
Combining fluorescence and photoemission electron microscopy for the investigation of ultrafast surface phenomena — •Daniel Fersch1, Sebastian Pres1, Bernhard Huber1, Victor Lisinetskii1, Matthias Hensen1, Enno Krauss2, Bert Hecht2, Heiko Lokstein3, and Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2NanoOptics & Biophotonics Group, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 3Department of Chemical Physics and Optics, Charles University Prague, 121 16 Praha 2, Czech Republic
To learn something about individual quantum systems and their interaction with the environment it is advantageous to look beyond the optical diffraction limit on ultrashort timescales. For this purpose, we use a scanning fluorescence microscope as well as an aberration-corrected photoemission electron microscope combined with a NOPA-based laser source, giving us an effective temporal and spatial resolution of sub-20 fs and sub-10 nm, respectively. Here, we present results on the polarization-dependent fluorescence enhancement of cyanobacterial Photosystem I thin films by gold nanorods, as well as first photoemission images of the protein dropcasted on monocrystalline gold flakes. We further show fluorescence and time-resolved photoemission from low-dimensional nanostructures performed with our pulse shaper. Finally, we want to use our microscopes to compare fluorescence-based multidimensional spectroscopy and coherent two-dimensional nanoscopy on the same samples.