Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 40: Ultrashort laser pulses I
Q 40.8: Talk
Thursday, March 20, 2014, 12:15–12:30, DO26 207
Simultaneous VUV and XUV attosecond pulse generation and characterization for attosecond pump probe experiments — Davide Fabris1, William A. Okell1, Daniel Walke1, Jost Henkel2, Manfred Lein2, •Tobias Witting1, Jon P. Marangos1, and John W.G. Tisch1 — 1Blackett Laboratory, Imperial College London, London SW7 2AZ, UK — 2Institut für Theoretis- che Physik and Centre for Quantum Engineering and Space-Time Re- search (QUEST), Leibniz Universität Hannover Appelstraße 2, 30167 Hannover, Germany
We report the generation and characterization of isolated attosecond XUV and VUV pulses generated simultaneously via HHG driven by near single-cycle infrared pulses using an in-line dual gas target system. Neon gas for HHG and a zircon filter was used to select photon energies in the XUV around 90 eV. Krypton gas for HHG and tin and indium filters were used to generate VUV radiation at 15 and 20eV. We characterized both the XUV and VUV pulses independently using the FROG-CRAB technique obtaining a 1.7±0.2 fs pulse using the In filter and a 616±50 as pulse using Sn, while preserving the simultaneously generated 266±10 as isolated XUV pulse. We confirm the experimentally determined pulse lengths by solving the time-dependent Schrödinger equation and investigate the influence of ionization gating in the VUV. The applicability of attosecond streaking for slow photoelectrons is also checked by numerical simulations.