Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )
O 36.85: Poster
Dienstag, 12. März 2013, 18:15–21:45, Poster B2
Optimized Extreme-Ultraviolet High-Harmonic Generation Output for trARPES from Correlated-Electron Materials — •J. Urbancic1, S. Eich1, M. Wiesenmayer1, A. V. Carr2, A. Ruffing1, S. Jakobs1, S. Hellman3, K. Jansen3, A. Stange3, M. M. Murnane2, H. C. Kapteyn2, L. Kipp3, K. Rossnagel3, M. Bauer3, S. Mathias1, and M. Aeschlimann1 — 1TU Kaiserslautern and Research Center OPTIMAS, 67663 Kaiserslautern, Germany — 2JILA, University of Colorado and NIST, Boulder, Colorado 80309-0440, USA — 3IEAP, University of Kiel, 24098 Kiel, Germany
Time- and angle-resolved photoemission spectroscopy (trARPES) using femtosecond laser pulses in the extreme ultraviolet (XUV) region plays a key role in the investigation of ultrafast quasiparticle dynamics in correlated-electron materials [1-4]. However, the full potential of this technique has not been achieved, i.e. all so far developed technical solutions suffered from a trade-off between photon flux, energy- and time-resolution. This was because of limitations in the intrinsic high-harmonic generation (HHG) process, and because of dispersive optical elements in the XUV-beamline that were needed to monochromatize the output of the HHG source. Here we show that using short-wavelength laser light to drive the HHG process and removing most of the dispersive elements offers an improved solution for efficient XUV trARPES with sub 30 fs time- and sub 150 meV energy-resolution.
[1] Rohwer et al., Nature 471, 490 (2011), [2] Petersen et al., PRL 107, 177402 (2011), [3] Carley et al., PRL 109, 057301 (2012), [4] Hellmann et al., Nat. Comm. 3, 1069 (2012)