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A narrow bandwidth extreme ultra-violet light source for time- and angle-resolved photoemission spectroscopy

Here, we present a high repetition rate, narrow bandwidth, extreme ultraviolet photon source for time- and angle-resolved photoemission spectroscopy. The narrow bandwidth pulses [Formula: see text]  meV for photon energies [Formula: see text]  eV are generated through high harmonic generation using...

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Detalles Bibliográficos
Autores principales: Guo, Qinda, Dendzik, Maciej, Grubišić-Čabo, Antonija, Berntsen, Magnus H., Li, Cong, Chen, Wanyu, Matta, Bharti, Starke, Ulrich, Hessmo, Björn, Weissenrieder, Jonas, Tjernberg, Oscar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Crystallographic Association 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9054270/
https://www.ncbi.nlm.nih.gov/pubmed/35540107
http://dx.doi.org/10.1063/4.0000149
Descripción
Sumario:Here, we present a high repetition rate, narrow bandwidth, extreme ultraviolet photon source for time- and angle-resolved photoemission spectroscopy. The narrow bandwidth pulses [Formula: see text]  meV for photon energies [Formula: see text]  eV are generated through high harmonic generation using ultra-violet drive pulses with relatively long pulse lengths (461 fs). The high harmonic generation setup employs an annular drive beam in tight focusing geometry at a repetition rate of 250 kHz. Photon energy selection is provided by a series of selectable multilayer bandpass mirrors and thin film filters, thus avoiding any time broadening introduced by single grating monochromators. A two stage optical-parametric amplifier provides < 100 fs tunable pump pulses from 0.65 μm to 9 μm. The narrow bandwidth performance of the light source is demonstrated through angle-resolved photoemission measurements on a series of quantum materials, including high-temperature superconductor Bi-2212, WSe(2), and graphene.