Bremen 2017 – scientific programme
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K: Fachverband Kurzzeitphysik
K 1: Meßtechnik - Optische Verfahren und veränderliche Plasmen
K 1.5: Talk
Monday, March 13, 2017, 15:35–15:55, GW2 B2890
Angle-resolved photoelectron spectroscopy utilizing attosecond pulse trains — •Alexander Guggenmos1,2, Stephan Heinrich1,2, Fabian Apfelbeck1, and Ulf Kleineberg1,2 — 1LMU München, Fakultät für Physik, Garching, Germany — 2Max-Planck-Institut für Quantenoptik, Garching, Germany
Attosecond physics has led to deep insights on electron dynamics in atoms, molecules and solids. One way to investigate processes on short timescales is the generation of isolated light pulses for attosecond electron streaking. Another approach with similar time resolution are attosecond pulse trains (APTs). Focusing APTs into a gas target photo ionizes the atoms and allows for the pulse characterization by means of the RABBITT technique. The spectral phase information of the APTs is encoded in the relative temporal position of a sideband maximum being created by the interference of neighboring harmonics through two-photon transitions. The characterized APTs allow now the access to photoemission processes in solids with RABBITT. Due to the APTs spectrum of many well separated harmonics with bandwidths of a few 100 meV this technique combines a narrowband excitation and high temporal resolution. This is the prerequisite for time- and angle-resolved photoelectron spectroscopy on band structures of solids. We will present experimental results on the characterization of APTs with a gas target as well as the RABBITT measurements on a tungsten crystal. This will allow for the subsequent step, combining RABBITT and ARPES in attosecond time resolved experiments investigating photoemission delays and band structures in gases and solid state targets.