title: A high-order harmonic generation apparatus for time- and angle-resolved photoelectron spectroscopy.
abstract: We present a table top setup for time- and angle-resolved photoelectron spectroscopy to investigate band structure dynamics of correlated materials driven far from equilibrium by femtosecond laser pulse excitation. With the electron-phonon equilibration time being in the order of 1-2 ps it is necessary to achieve sub-picosecond time resolution. Few techniques provide both the necessary time and energy resolution to map non-equilibrium states of the band structure. Laser-driven high-order harmonic generation is such a technique. In our experiment, a grating monochromator delivers tunable photon energies up to 40 eV. A photon energy bandwidth of 150 meV and a pulse duration of 100 fs FWHM allow us to cover the k-space necessary to map valence bands at different kz and detect outer core states.
authors.affiliation: Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Frietsch
authors.forename: R
authors.initials: R
authors.lastname: Carley
authors.forename: K
authors.initials: K
authors.lastname: Döbrich
authors.forename: C
authors.initials: C
authors.lastname: Gahl
authors.forename: M
authors.initials: M
authors.lastname: Teichmann
authors.forename: O
authors.initials: O
authors.lastname: Schwarzkopf
authors.forename: Ph
authors.initials: P
authors.lastname: Wernet
authors.forename: M
authors.initials: M
authors.lastname: Weinelt