Cited by 250Laser-Matter Interactions and ApplicationsAdvanced X-ray Imaging TechniquesParticle Accelerators and Free-Electron Lasers

Four-wave mixing experiments with extreme ultraviolet transient gratings

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Bencivenga, F., Cucini, R., Capotondi, F., Battistoni, A., Mincigrucci, R., Giangrisostomi, E., Gessini, A., Manfredda, M. +9 more·2015·Nature

Abstract

Four-wave mixing (FWM) processes, based on third-order nonlinear light-matter interactions, can combine ultrafast time resolution with energy and wavevector selectivity, and enable the exploration of dynamics inaccessible by linear methods. The coherent and multi-wave nature of the FWM approach has been crucial in the development of advanced technologies, such as silicon photonics, subwavelength imaging and quantum communications. All these technologies operate at optical wavelengths, which limits the spatial resolution and does not allow the probing of excitations with energy in the electronvolt range. Extension to shorter wavelengths--that is, the extreme ultraviolet and soft-X-ray ranges--would allow the spatial resolution to be improved and the excitation energy range to be expanded, as well as enabling elemental selectivity to be achieved by exploiting core resonances. So far, FWM applications at such wavelengths have been prevented by the absence of coherent sources of sufficient brightness and of suitable experimental set-ups. Here we show how transient gratings, generated by the interference of coherent extreme-ultraviolet pulses delivered by the FERMI free-electron laser, can be used to stimulate FWM processes at suboptical wavelengths. Furthermore, we have demonstrated the possibility of observing the time evolution of the FWM signal, which shows the dynamics of coherent excitations as molecular vibrations. This result opens the way to FWM with nanometre spatial resolution and elemental selectivity, which, for example, would enable the investigation of charge-transfer dynamics. The theoretical possibility of realizing these applications has already stimulated ongoing developments of free-electron lasers: our results show that FWM at suboptical wavelengths is feasible, and we hope that they will enable advances in present and future photon sources.

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  • Nonlinear experiments combining x-ray and optical beams have been reported in atoms and crystals.

    “Nonlinear experiments that combine x-ray and optical beams have been reported in atoms and crystals, and all x-ray wave mixing measurements in molecules are on the horizon [39].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [39]

  • Degenerate four-wave mixing in the XUV regime is feasible, as demonstrated by Bencivenga et al.

    “Although already proposed in the literature [72], only recently Bencivenga et al, [39] demonstrated the feasibility of degenerate FWM in the XUV regime.”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [39]

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Research works printed but not linked: 1

  1. [2]Boyd WR Nonlinear Optics 2008 Academic Press

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Authors
Bencivenga, F., Cucini, R., Capotondi, F., Battistoni, A., Mincigrucci, R., Giangrisostomi, E., Gessini, A., Manfredda, M., Nikolov, I. P., Pedersoli, E., Principi, E., Svetina, C., Parisse, P., Casolari, F., Danailov, M. B., Kiskinova, M., & Masciovecchio, C.
Affiliations
  • Elettra-Sincrotrone Trieste S.C.p.A. (IT)
  • University of Trieste (IT)
  • University of Perugia (IT)
Corresponding author
  • Bencivenga, F.
  • Masciovecchio, C.
Venue
Nature
Published
2015-04
Volume
520
Issue
7546
Pages
205-208
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2033627791
Cited by
250
References
43
Citations by year
2026: 13 · 2025: 20 · 2024: 27 · 2023: 19 · 2022: 20 · 2021: 21 · 2020: 24 · 2019: 22 · 2018: 20 · 2017: 30 · 2016: 27 · 2015: 6 · 2014: 1
FWCI
13.99
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Physics and Astronomy › Radiation › Advanced X-ray Imaging Techniques
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Particle Accelerators and Free-Electron Lasers
Keywords
four-wave mixing, free-electron laser, FERMI free-electron laser, third-order nonlinear optics, vibrational modes, coherent excitation, soft X-rays, ultrafast dynamics, charge transfer dynamics, coherent X-ray sources, time-resolved spectroscopy, femtosecond pulses

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