Time-resolved ARPES with sub-15 fs temporal and near Fourier-limited spectral resolution

An experimental setup for time- and angle-resolved photoelectron spectroscopy with sub-15 fs temporal resolution is presented. A hollow-fibercompressor is used for the generation of 6.5 fs white light pump pulses, and a high-harmonic-generation source delivers 11 fs probe pulses at a photon energy of 22.1 eV. A value of 13 fs full width at half-maximum of the pump-probe cross correlation signal is determined by analyzing aphotoemission intensity transient probing a near-infrared interband transition in 1T-TiSe2. Notably, the energy resolution of the setup conforms to typical values reported in conventional time-resolvedphotoemission studies using high harmonics, and an ultimate resolution of 170 meV is feasible.

Source: Review of Scientific Instruments - October 3, 2016 Category: Physics Authors: G. Rohde, A. Hendel, A. Stange, K. Hanff, L.-P. Oloff, L. X. Yang, K. Rossnagel and M. Bauer Source Type: research