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O: Fachverband Oberflächenphysik

O 88: Molecular Films

O 88.9: Vortrag

Freitag, 15. März 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. Thielen^1,4 — 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.