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Article
Complete reconstruction of bound and unbound electronic wavefunctions in two-photon double ionization
To be complete, the characterization of the photoionization process of atoms and molecules requires the extraction of all quantum-mechanical phases and amplitudes. So far, complete experiments have accessed on...
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Article
Coherent control with a short-wavelength free-electron laser
Researchers demonstrate correlation of two colours (63.0 and 31.5 nm wavelengths) in a free-electron laser and control photoelectron angular distribution by adjusting phase with 3 attosecond resolution.
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Article
Full tunability of laser femtosecond high-order harmonics in the ultraviolet spectral range
We demonstrate experimentally the full tunability of a coherent femtosecond source in the whole ultraviolet spectral region. The experiment relies on the technique of high-order harmonic generation driven by a...
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Article
Two-step excitation of Rb atoms on He nanodroplets
We present the first sequential laser excitation of atom-doped helium nanodroplets. Rubidium atoms on the surface of helium nanodroplets are selectively excited with a continuous wave laser to the 52P1/2 state s...
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Article
Spectroscopy of alkali atoms (Li, Na, K) attached to large helium clusters
Large liquid helium clusters (Hen, n ≈ 104) produced in a supersonic jet are doped with alkali atoms (Li, Na, K) and characterized by means of laser induced fluorescence. Each cluster contains, on average, less t...