A high-order harmonic generation apparatus for time- and angle-resolved photoelectron spectroscopy

作者：Frietsch B; Carley R; Doebrich K; Gahl C; Teichmann M; Schwarzkopf O; Wernet Ph; Weinelt M^*

来源：Review of Scientific Instruments, 2013, 84(7): 075106.

DOI：10.1063/1.4812992

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 k(z) and detect outer core states.

• 出版日期2013-7