Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 35: Plasmonics III (joint session O/CPP)
CPP 35.6: Vortrag
Mittwoch, 3. April 2019, 11:45–12:00, H8
A versatile setup utilizing shaped optical pulses and time-resolved photoemission electron microscopy to disentangle the ultrafast local response of nanostructured surface systems — •Sebastian Pres1, Bernhard Huber1, Daniel Fersch1, Enno Krauss2, Daniel Friedrich2, Victor Lisinetskii1, Matthias Hensen1, Bert Hecht2, and Tobias Brixner1 — 1Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Nano-Optics & Biophotonics Group, Experimentelle Physik 5, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
The possibility to disentangle local field dynamics on nanometer length scales is an important prerequisite for the exploration of interactions between nanostructures and nearby quantum systems.
We combine time-resolved aberration-corrected photoemission electron microscopy, enabling sub-10 nm spatial resolution, with a widely tunable laser source generating sub-20 fs excitation pulses at 1 MHz repetition rate.
Phase-stable pulse sequences are formed by liquid-crystal-based pulse shaping and characterised by Fourier-transform spectral interferometry.
A detailed knowledge of each pulse sequence’s amplitude and phase structure during the measurement allows to quantitatively analyse the influence of the pulse shape and laser spectrum on resulting time-resolved multidimensional spectroscopy signals.
Using coherent 2D nanoscopy [1] we investigate local field dynamics within a plasmonic nanoslit resonator.
[1] M. Aeschlimann et al., Nat. Photonics, Vol. 9 (2015)