Extreme-ultraviolet vortices from a free-electron laser

Primož Rebernik Ribič, Benedikt Rösner, David Gauthier, Enrico Allaria, Florian Döring, Laura Foglia, Luca Giannessi, Nicola Mahne, Michele Manfredda, Claudio Masciovecchio, Riccardo Mincigrucci, Najmeh Mirian, Emiliano Principi, Eléonore Roussel, Alberto Simoncig, Simone Spampinati, Christian David, Giovanni De Ninno

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Extreme-ultraviolet vortices may be exploited to steer the magnetic properties of nanoparticles, increase the resolution in microscopy, and gain insight into local symmetry and chirality of a material; they might even be used to increase the bandwidth in long-distance space communications. However, in contrast to the generation of vortex beams in the infrared and visible spectral regions, production of intense, extreme-ultraviolet and x-ray optical vortices still remains a challenge. Here, we present an in-situ and an ex-situ technique for generating intense, femtosecond, coherent optical vortices at a free-electron laser in the extreme ultraviolet. The first method takes advantage of nonlinear harmonic generation in a helical undulator, producing vortex beams at the second harmonic without the need for additional optical elements, while the latter one relies on the use of a spiral zone plate to generate a focused, micron-size optical vortex with a peak intensity approaching 1014W=cm2, paving the way to nonlinear optical experiments with vortex beams at short wavelengths.
Original languageEnglish
Article number031036
Pages (from-to)-
JournalPhysical Review X
Issue number3
Publication statusPublished - 28 Aug 2017
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ribič, P. R., Rösner, B., Gauthier, D., Allaria, E., Döring, F., Foglia, L., Giannessi, L., Mahne, N., Manfredda, M., Masciovecchio, C., Mincigrucci, R., Mirian, N., Principi, E., Roussel, E., Simoncig, A., Spampinati, S., David, C., & De Ninno, G. (2017). Extreme-ultraviolet vortices from a free-electron laser. Physical Review X, 7(3), -. [031036]. https://doi.org/10.1103/PhysRevX.7.031036