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EnglishThe quest for investigating the non-equilibrium dynamics of the band structure of strongly-correlated materials over their entire Brillouin zone is a primary objective. However, the actual ultrafast UV light sources are not suitable for addressing several critical questions in the field. Here we report on a novel light source generating sub-250 fs, 9.3 eV photon energy light pulses at 250 kHz repetition rate, obtained via third-harmonic generation in Xe of frequency-doubled 50 fs laser pulses at 1.55 eV. By reporting the measured band dispersion of a Cu(111) crystal and the non-equilibrium dynamics of the Bi2Se3 topological insulator, we prove that this source is suitable for studying the non-equilibrium dynamics of the entire Fermi surface of several complex materials, with high signal statistics and limited space-charge effect.
| Titolo: | Advancing non-equilibrium ARPES experiments by a 9.3 eV coherent ultrafast photon source |
| Autori: | |
| Data di pubblicazione: | 2016 |
| Rivista: | |
| Abstract: | The quest for investigating the non-equilibrium dynamics of the band structure of strongly-correlated materials over their entire Brillouin zone is a primary objective. However, the actual ultrafast UV light sources are not suitable for addressing several critical questions in the field. Here we report on a novel light source generating sub-250 fs, 9.3 eV photon energy light pulses at 250 kHz repetition rate, obtained via third-harmonic generation in Xe of frequency-doubled 50 fs laser pulses at 1.55 eV. By reporting the measured band dispersion of a Cu(111) crystal and the non-equilibrium dynamics of the Bi2Se3 topological insulator, we prove that this source is suitable for studying the non-equilibrium dynamics of the entire Fermi surface of several complex materials, with high signal statistics and limited space-charge effect. |
| Handle: | http://hdl.handle.net/11368/2882064 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.elspec.2015.12.002 |
| URL: | http://www.sciencedirect.com/science/article/pii/S0368204815002881 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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| 1-s2.0-S0368204815002881-main.pdf | Documento in Versione Editoriale | Digital Rights Management non definito | Administrator Richiedi una copia | |
| 1-s2.0-S0368204815002881-post print.pdf | Bozza finale post-referaggio (post-print) |  | Open Access Visualizza/Apri |
http://hdl.handle.net/11368/2882064
