Regensburg 2013 – scientific programme
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O: Fachverband Oberflächenphysik
O 88: Molecular Films
O 88.9: Talk
Friday, March 15, 2013, 12:30–12:45, H38
Determining excitation pathways in a hybrid metal-organic interface state using coherent 2D nanoscopy — M. Aeschlimann1, T. Brixner2, M. Cinchetti1, N. Großmann1, M. Hensen3, C. Kramer2, P. Melchior1, W. Pfeiffer3, M. Piecuch1, C. Schneider1, S. Steil1, C. Strüber3, and •P. Thielen1,4 — 1Fachbereich Physik and Research Center OPTIMAS, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany — 2Institut für Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 3Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33615 Bielefeld, Germany — 4Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany
Coherent 2D nanoscopy combines the principle of conventional 2D spectroscopy with photoemission electron microscopy (PEEM). While 2D spectra are well suited for studying the dynamics of quantum states as well as interactions between them, PEEM allows for detection of the electrical near field of nano-structured samples with a resolution beyond the optical diffraction limit. We use coherent 2D nanoscopy to study the hybrid electronic state forming at the interface between cobalt and the organometallic complex tris(8-hydroxyquinolinato)aluminium (Alq3). We observe the excitation paths at such a hybrid metal-organic interface and monitor the subsequent electron dynamics in the hybrid interface state. The lateral resolution enables us to address small ensembles of quantum systems rather than large-scale averaging.