Saule T, Heinrich S, Schoetz J, Lilienfein N, Hoegner M, Devries O, Ploetner M, Weitenberg J, Esser D, Schulte J, Russbueldt P, Limpert J, Kling MF, Kleineberg U, Pupeza I (2019)
Publication Type: Journal article
Publication year: 2019
Book Volume: 10
Article Number: 458
Journal Issue: 1
DOI: 10.1038/s41467-019-08367-y
Laser-dressed photoelectron spectroscopy, employing extreme-ultraviolet attosecond pulses obtained by femtosecond-laser-driven high-order harmonic generation, grants access to atomic-scale electron dynamics. Limited by space charge effects determining the admissible number of photoelectrons ejected during each laser pulse, multidimensional (i.e. spatially or angle-resolved) attosecond photoelectron spectroscopy of solids and nanostructures requires high-photon-energy, broadband high harmonic sources operating at high repetition rates. Here, we present a high-conversion-efficiency, 18.4-MHz-repetition-rate cavity-enhanced high harmonic source emitting 5 × 10 5 photons per pulse in the 25-to-60-eV range, releasing 1 × 10 10 photoelectrons per second from a 10-µm-diameter spot on tungsten, at space charge distortions of only a few tens of meV. Broadband, time-of-flight photoelectron detection with nearly 100% temporal duty cycle evidences a count rate improvement between two and three orders of magnitude over state-of-the-art attosecond photoelectron spectroscopy experiments under identical space charge conditions. The measurement time reduction and the photon energy scalability render this technology viable for next-generation, high-repetition-rate, multidimensional attosecond metrology.
APA:
Saule, T., Heinrich, S., Schoetz, J., Lilienfein, N., Hoegner, M., Devries, O.,... Pupeza, I. (2019). High-flux ultrafast extreme-ultraviolet photoemission spectroscopy at 18.4 MHz pulse repetition rate. Nature Communications, 10(1). https://doi.org/10.1038/s41467-019-08367-y
MLA:
Saule, T., et al. "High-flux ultrafast extreme-ultraviolet photoemission spectroscopy at 18.4 MHz pulse repetition rate." Nature Communications 10.1 (2019).
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