Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 18: Plasmonics and Nanooptics II: Ultrafast and Nonlinear Phenomena (joint session O/CPP)
O 18.3: Talk
Monday, March 16, 2020, 15:45–16:00, WIL A317
Coherent two-dimensional nanoscopy on coupled plasmonic nanostructures — •Lysanne Monika Dietrich1, Daniel Friedrich2, Jessica Meier2, Enno Krauss2, Daniel Fersch1, Raphael Wichary1, Victor Lisinetskii1, Matthias Hensen1, Bert Hecht2, 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
Two-dimensional (2D) nanoscopy combines the femtosecond time resolution of coherent 2D spectroscopy with nanoscale selectivity: Instead of measuring optical diffraction-limited light fields, we detect photoemitted electrons with a spatial resolution < 5 nm utilizing aberration-corrected photoemission electron microscopy (AC-PEEM) [1]. Since 2D spectroscopy provides direct insights into couplings between single system constituents, we investigate coupled plasmonic nanostructures (i.e. "dolmen" structures) as a model system [2,3] to demonstrate the additional spatial resolution. We complement our experimental findings by simulated 2D spectra using the local response function as retrieved from finite-difference time-domain (FDTD) method.
[1] B. Huber et al., Rev. Sci. Instrum., 90, 113103 (2019).
[2] H. Yu et al., ACS Nano, 10, 10373-10391 (2016).
[3] J.-S. Huang et al., Nano Lett., 10, 2105-2110 (2010).