Observation of magnetic helicoidal dichroism with extreme ultraviolet
  light vortices

Fanciulli, Mauro; Pancaldi, Matteo; Pedersoli, Emanuele; Vimal, Mekha; Bresteau, David; Luttmann, Martin; De Angelis, Dario; Ribič, Primož Rebernik; Rösner, Benedikt; David, Christian; Spezzani, Carlo; Manfredda, Michele; Sousa, Ricardo; Prejbeanu, Ioan-Lucian; Vila, Laurent; Dieny, Bernard; De Ninno, Giovanni; Capotondi, Flavio; Sacchi, Maurizio; Ruchon, Thierry

doi:10.48550/arXiv.2103.13697

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Observation of magnetic helicoidal dichroism with extreme ultraviolet light vortices

Version 2 2023-06-08, 12:43

Version 1 2023-01-11, 22:22

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posted on 2023-06-08, 12:43 authored by Mauro Fanciulli, Matteo Pancaldi, Emanuele Pedersoli, Mekha Vimal, David Bresteau, Martin Luttmann, Dario De Angelis, Primož Rebernik Ribič, Benedikt Rösner, Christian David, Carlo Spezzani, Michele Manfredda, Ricardo Sousa, Ioan-Lucian Prejbeanu, Laurent Vila, Bernard Dieny, Giovanni De Ninno, Flavio Capotondi, Maurizio Sacchi, Thierry Ruchon

We report on the experimental evidence of magnetic helicoidal dichroism, observed in the interaction of an extreme ultraviolet vortex beam carrying orbital angular momentum with a magnetic vortex. Numerical simulations based on classical electromagnetic theory show that this dichroism is based on the interference of light modes with different orbital angular momenta, which are populated after the interaction between the light phase chirality and the magnetic topology. This observation gives insight into the interplay between orbital angular momentum and magnetism, and sets the framework for the development of new analytical tools to investigate ultrafast magnetization dynamics.

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physics.optics (arXiv)

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