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O: Fachverband Oberflächenphysik

O 74: Ultrafast Electron and Spin Dynamics at Interfaces

O 74.3: Poster

Mittwoch, 9. März 2016, 18:15–20:30, Poster A

High harmonic generation at 500 kHz: an XUV light source for solid state spectroscopy — •Johannes Feldl, Michele Puppin, Yunpei Deng, Martin Wolf, and Ralph Ernstorfer — Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin

We present a table-top ultrafast extreme ultraviolet (XUV) light source operating at a repetition rate of 500 kHz. The frequency-doubled output of an optical parametric chirped pulse laser amplifier drives high harmonic generation (HHG) in noble gas jets with high backing pressure. A single harmonic with photon energy near 22 eV and a bandwidth of 100 meV is spectrally isolated. The best photon flux, exceeding 10¹¹ photon/s from HHG, was obtained with an argon gas jet. This high-repetition rate XUV light source permits time- and angle-resolved photoemission spectroscopy with high counting statistics and provides access to electron dynamics in the full Brillouin zone.