Here, we report on a novel narrowband High Harmonic Generation (HHG) light source designed for ultrafast photoelectron spectroscopy (PES) on solids. Notably, at 16.9 eV photon energy, the harmonics bandwidth equals 19 meV. This result has been obtained by seeding the HHG process with 230 fs pulses at 515 nm. The ultimate energy resolution achieved on a polycrystalline Au sample at 40 K is ∼22 meV at 16.9 eV. These parameters set a new benchmark for narrowband HHG sources and have been obtained by varying the repetition rate up to 200 kHz and, consequently, mitigating the space charge, operating with ≈ 3 × 10 7 electrons/s and ≈ 5 × 10 8 photons/s. By comparing the harmonics bandwidth and the ultimate energy resolution with a pulse duration of ∼105 fs (as retrieved from time-resolved experiments on bismuth selenide), we demonstrate a new route for ultrafast space-charge-free PES experiments on solids close to transform-limit conditions.
Coherent Narrowband Light Source for Ultrafast Photoelectron Spectroscopy in the 17-31 eV photon energy range / R. Cucini, T. PINCELLI, G. Panaccione, D. Kopic, F. Frassetto, P. Miotti, G. Marco Pierantozzi, S. Peli, A. Fondacaro, A. De Luisa, A. DE VITA, P. Carrara, D. Krizmancic, D.T. Payne, F. Salvador, A. Sterzi, L. Poletto, F. Parmigiani, G. ROSSI, A. Federico Cilento. - In: STRUCTURAL DYNAMICS. - ISSN 2329-7778. - 7:1(2020 Jan 31).
Titolo: | Coherent Narrowband Light Source for Ultrafast Photoelectron Spectroscopy in the 17-31 eV photon energy range | |
Autori: | PINCELLI, TOMMASO (Secondo) ROSSI, GIORGIO (Penultimo) | |
Parole Chiave: | High Harmonic Generation, Pump-Probe Photoemission | |
Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia Settore FIS/01 - Fisica Sperimentale | |
Data di pubblicazione: | 31-gen-2020 | |
Rivista: | ||
Tipologia: | Article (author) | |
Data ahead of print / Data di stampa: | 2019 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/1.5131216 | |
Appare nelle tipologie: | 01 - Articolo su periodico |
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SDY19-AR-00120.pdf | prove di stampa | Post-print, accepted manuscript ecc. (versione accettata dall'editore) | Open Access Visualizza/Apri | |
1.5131216.pdf | Publisher's version/PDF | Open Access Visualizza/Apri |