2019/10/11 by Riccardo Cucini, Cucini, Riccardo, Tommaso Pincelli +37
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Advanced Chemical Physics Studies #Advanced Electron Microscopy Techniques and Applications #FOS: Physical sciences #Laser-Matter Interactions and Applications #Materials Science (cond-mat.mtrl-sci) #Optics (physics.optics) #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.1910.05074
openalex publication_date 2019/10/11 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
Here we report on a novel High Harmonic Generation (HHG) light source\ndesigned for space charge free ultrafast photoelectron spectroscopy (PES) on\nsolids. The ultimate overall energy resolution achieved on a polycrystalline Au\nsample is ~22 meV at 40 K. These results have been obtained at a photon energy\nof 16.9 eV with a pulse bandwidth of ~19 meV, by varying, up to 200 kHz, the\nphoton pulses repetition rate and the photon fluence on the sample. These\nfeatures set a new benchmark for tunable narrowband HHG sources. By comparing\nthe PES energy resolution and the photon pulse bandwidth with a pulse duration\nof ~105 fs, as retrieved from time-resolved (TR) angle resolved (AR) PES\nexperiments on Bi2Se3, we validate a way for a space charge free\nphotoelectric process close to Fourier transform limit conditions for ultrafast\nTR-PES experiments on solids.\n