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Showing 1–11 of 11 results
Advanced filters: Author: Alberto Simoncig Clear advanced filters

  • Core excitons are strongly localised excitonic states impacting x-ray absorption and resonant inelastic scattering (RIXS) spectra. Here, the authors demonstrate an application of free electron laser-driven ultrafast RIXS spectroscopy to study previously unclear aspects of core exciton-phonon interactions in graphite.

    • Marco Malvestuto
    • Beatrice Volpato
    • Dino Novko
    ResearchOpen Access
    Nature Communications
    Volume: 17, P: 1-10

  • A feasible route towards electron microscopy at the attosecond timescale is now possible thanks to the implementation of an optical gating approach.

    • Alberto Simoncig
    News & Views
    Nature Photonics
    Volume: 11, P: 405-407

  • Researchers generated 16.7 nm wavelength extreme-ultraviolet Poincaré beams at the FERMI free electron laser without relying on optical elements. The method of in situ Poincaré beam production in free electron lasers enables straightforward flexibility in the orientation and balance of polarization states, and can be extended to other vector beams and to shorter wavelengths.

    • Jenny Morgan
    • Primož Rebernik Ribič
    • Erik Hemsing
    Research
    Nature Photonics
    Volume: 19, P: 946-951

  • The electron transfer from aluminum to hematite in a thermite reaction is investigated here using femtosecond extreme-ultraviolet spectroscopy, offering insights into charge flow in energetic materials and laying the basis for studying chemical reactions in the solid state at the femtosecond timescale.

    • Ettore Paltanin
    • Jacopo S. Pelli Cresi
    • Claudio Masciovecchio
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-8

  • Light-induced ultrafast switching between the molecular isomers norbornadiene and quadricyclane can reversibly store and release a substantial amount of chemical energy. Two competing pathways have now been identified by which electronically excited quadricyclane molecules relax to the electronic ground state, facilitating interconversion between the two isomers on different timescales.

    • Kurtis D. Borne
    • Joseph C. Cooper
    • Daniel Rolles
    ResearchOpen Access
    Nature Chemistry
    Volume: 16, P: 499-505

  • Relative synchronization between free-electron laser pulses and a near-infrared field fields is achieved with 24 as resolution by using a correlation analysis of single-shot photoelectron spectra. It is applied to coherently control the photoionization process in neon atom on the attosecond timescale.

    • Praveen Kumar Maroju
    • Michele Di Fraia
    • Giuseppe Sansone
    Research
    Nature Photonics
    Volume: 17, P: 200-207

  • Generation of intense attosecond waveforms with independently controllable amplitude and phase is performed by using a seeded free-electron laser.

    • Praveen Kumar Maroju
    • Cesare Grazioli
    • Giuseppe Sansone
    Research
    Nature
    Volume: 578, P: 386-391

  • The findings that the spatial distribution of an optical field with vortex phase profile can be imprinted coherently onto a propagating electron wave reveal new aspects of light–matter interactions and will help develop future single-photon electron spectroscopy.

    • Giovanni De Ninno
    • Jonas Wätzel
    • Jamal Berakdar
    Research
    Nature Photonics
    Volume: 14, P: 554-558

  • Attosecond pulse trains, crucial for ultrafast science, traditionally consist of only odd harmonics due to symmetry constraints in high-order harmonic generation. Here, the authors extend the RABBIT technique to analyze non-consecutive harmonics, enabling the temporal reconstruction of attosecond pulse trains and advancing metrology in extreme ultraviolet spectroscopy.

    • Praveen Kumar Maroju
    • Miguel Benito de Lama
    • Giuseppe Sansone
    ResearchOpen Access
    Communications Physics
    Volume: 8, P: 1-11