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O: Oberflächenphysik
O 12: Postersitzung (Struktur und Dynamik reiner Oberfl
ächen, Grenzfl
äche fest-flüssig, Nanostrukturen, Teilchen und Cluster, Halbleiteroberfl
ächen und Grenzfl
ächen, Zeitaufgelöste Spektroskopie, Rastersondentechniken, Methodisches)
O 12.14: Poster
Montag, 24. März 2003, 18:00–21:00, P1
Time-resolved Photoemission Electron Microscopy : Nanoscale Spectroscopy with Femtosecond Resolution — •Michael Bauer1, Carsten Wiemann1, Oleksiy Andreyev1, Martin Aeschlimann1, Oliver Schmidt2, and Gerd Schönhense2 — 1Fachbereich Physik, Technische Universität Kaiserslautern, 67663 Kaiserslautern — 2Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz
Recently we could show that combination of Photoemission Electron Microscopy (PEEM) and time-resolved Two-Photon Photoemission Spectroscopy is capable to directly monitor lateral variations of the relaxation dynamics of optical excited electrons with high spatial resolution [1]. In the future we expect this technique to be a helpful tool in particular with respect to investigations of ultrafast relaxation processes at heterogeneous (nanostructured) surfaces. In this contribution we will discuss different aspects of this new technique. We will focus on the principles of its technical realization (including the present state and the problems to be solved), our first experimental results, and future projects.
[1] O. Schmidt, M. Bauer, C. Wiemann, R. Porath, M. Scharte, O. Andreyev, G. Schönhense, and M. Aeschlimann, Appl. Phys. B. 74, 223 (2002)