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- Title
High photon flux table-top coherent extreme-ultraviolet source.
- Authors
Hädrich, Steffen; Klenke, Arno; Rothhardt, Jan; Krebs, Manuel; Hoffmann, Armin; Pronin, Oleg; Pervak, Vladimir; Limpert, Jens; Tünnermann, Andreas
- Abstract
High harmonic generation (HHG) enables extreme-ultraviolet radiation with table-top set-ups. Its exceptional properties, such as coherence and (sub)-femtosecond pulse durations, have led to a diversity of applications. Some of these require a high photon flux and megahertz repetition rates, for example, to avoid space charge effects in photoelectron spectroscopy. To date, this has only been achieved with enhancement cavities. Here, we establish a novel route towards powerful HHG sources. By achieving phase-matched HHG of a megahertz fibre laser we generate a broad plateau (25 eV-40 eV) of strong harmonics, each containing more than 1 × 1012 photons s-1, which constitutes an increase by more than one order of magnitude in that wavelength range. The strongest harmonic (H25, 30 eV) has an average power of 143 μW (3 × 1013 photons s-1). This concept will greatly advance and facilitate applications in photoelectron or coincidence spectroscopy, coherent diffractive imaging or (multidimensional) surface science.
- Subjects
HARMONIC generation; PULSE width modulation; PHOTOELECTRONS; PHOTONS; PHOTONICS
- Publication
Nature Photonics, 2014, Vol 8, Issue 10, p779
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2014.214