Regensburg 2013 – scientific programme
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )
O 36.42: Poster
Tuesday, March 12, 2013, 18:15–21:45, Poster B2
Theory for Multidimensional Coherent Spectroscopy of Plasmon Assisted Multi-Photon-Photoemission — Martin Aeschlimann1, Tobias Brixner3, Matthias Hensen2, Christian Kramer3, Pascal Melchior1, Walter Pfeiffer2, •Martin Piecuch1, Christian Schneider1, Christian Strüber2, and Philip Thielen1 — 1Fachbereich Physik and Research Center OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany — 2Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany — 3Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
The recently demonstrated coherent 2D nanoscopy [1] allows for multi-dimensional coherent spectroscopy with sub-diffraction spatial resolution. In a first application the local hybridization of plasmon modes was investigated on a corrugated silver film [1]. The complete interpretation of multidimensional spectra requires a suitable model for the excitation process. Here we present a model for plasmon assisted multiphoton photoemission in which both, collective and single particle excitations are treated as quantum excitations. Based on this, coherent 2D spectra are simulated and the concept of phase cycling is applied to identify particular quantum mechanical pathways through an appropriate linear combination of detectable photoemission signals. The resulting two dimensional photoemission spectra grant direct access to the coupling parameter of the system under investigation.
[1] Aeschlimann et al., Science 333 (6050), 1723-1726 (2011)