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Showing 1–13 of 13 results
Advanced filters: Author: Francesca Calegari Clear advanced filters
  • Water vibrational motion, which occurs on the few-femtosecond timescale and underpins energy transfer within the hydrogen bonding network, has remained challenging to observe in real time due to constraints in time resolution. Here, the authors investigate the ground state vibrational dynamics of liquid water using a sub-5 fs near-infrared pump pulse and few-fs ultraviolet probe pulses, observing rapid dephasing of the OH stretch mode that precedes its relaxation via coupling to the bend modes.

    • Gaia Giovannetti
    • Sergey Ryabchuk
    • Francesca Calegari
    ResearchOpen Access
    Communications Chemistry
    Volume: 9, P: 1-8
  • Seven scientists share their views on some of the latest developments in attosecond science and X-ray free electron lasers (XFELs) and highlight exciting new directions.

    • Eva Lindroth
    • Francesca Calegari
    • Olga Smirnova
    Reviews
    Nature Reviews Physics
    Volume: 1, P: 107-111
  • The authors investigate the ultrafast dissociative dynamics of iodomethane induced by sudden ultraviolet photoexcitation. They showcase how subsequent ionization within a 5-femtosecond window can stabilize the molecule and prevent fragmentation.

    • Lorenzo Colaizzi
    • Sergey Ryabchuk
    • Francesca Calegari
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-8
  • Without a very precise timer one can never catch up with the electron released in photoemission. Attosecond streaking spectroscopy allows such a chronometer clock to be set to zero and reveals the role of electron correlations.

    • Francesca Calegari
    News & Views
    Nature Physics
    Volume: 13, P: 207-208
  • Time-resolved photoelectron circular dichroism with a temporal resolution of 2.9 fs is used to track the ultrafast electron dynamics following ultraviolet excitation of neutral chiral molecules, which generate chiral currents that exhibit periodic rotation direction reversal.

    • Vincent Wanie
    • Etienne Bloch
    • Francesca Calegari
    ResearchOpen Access
    Nature
    Volume: 630, P: 109-115
  • Sudden ionisation of larger molecules can initiate a correlation-driven process called charge migration, but due to its short time scale this process is challenging to observe. Here, the authors ionise adenine with extreme ultraviolet light and observe electron correlation in the molecule at the attosecond scale in real-time.

    • Erik P. Månsson
    • Simone Latini
    • Francesca Calegari
    ResearchOpen Access
    Communications Chemistry
    Volume: 4, P: 1-7
  • Diffraction imaging studies of free individual nanoparticles have so far been restricted to XUV and X-ray free - electron laser facilities. Here the authors demonstrate the possibility of using table-top XUV laser sources to image prolate shapes of superfluid helium droplets.

    • Daniela Rupp
    • Nils Monserud
    • Arnaud Rouzée
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-7
  • Attosecond streaking is used to study the dynamics of electron scattering in dielectric nanoparticles in real time. Revealing the mechanisms involved is the first step towards understanding electron scattering in more complex dielectrics.

    • L. Seiffert
    • Q. Liu
    • M. F. Kling
    Research
    Nature Physics
    Volume: 13, P: 766-770
  • Attosecond science is nowadays a well-established research field, and table-top attosecond sources based on high-harmonic generation are routinely used to access electronic motion in matter at its natural time scale. Here, the authors describe a new way of doing chemistry—attochemistry—by directly acting on the electronic motion, and discuss a few key open questions in this emerging field.

    • Francesca Calegari
    • Fernando Martin
    Comments & OpinionOpen Access
    Communications Chemistry
    Volume: 6, P: 1-5