Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Electronic Structure of Surfaces: Spectroscopy, Surface States

O 46.3: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1A

Time-resolved momentum microscopy with fs-XUV light — •Christina Schott¹, Markus Rollinger¹, Sebastian Emmerich¹, Johannes Seidel¹, Florian Haag¹, Norman Haag¹, Steffen Eich¹, Mirko Cinchetti², Benjamin Stadtmüller¹, and Martin Aeschlimann¹ — ¹University of Kaiserslautern and Research Center OPTIMAS, Erwin-Schrödinger-Str. 46, 67663 Kaiserslautern, Germany — ²Experimentelle Physik VI, Technische Universität Dortmund, 44221 Dortmund, Germany

Time resolved photoemission spectroscopy with a fs-XUV light source is a powerful technique to investigate ultrafast optically induced electron dynamics in solid state systems [1,2]. The combination of this technique with momentum microscopy, a novel tool for angle resolved photoemission, allows us to capture transient snapshots of the ultrafast dynamics for both parallel momentum components for one fixed binding energy. Together with the large photon energy of our fs-XUV light source, we can access the electron dynamics throughout the entire first Brillouin zone of typical sample systems. Here, we will show the capability of our new setup for time-resolved optical-pump, fs-XUV probe momentum microscopy. We will discuss experimental challenges such as space charge effects and long-term stability using dedicated sample systems. Moreover, we will present our first results of the transient band structure dynamics of metallic surfaces using time-resolved momentum microscopy.

[1] Rohwer et al, Nature (2011) [2] Eich et al, J el. Spec (2014)