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Highly multimodal structure of high topological charge extreme ultraviolet vortex beams

Abstract : Optical beams carrying Orbital Angular Momentum (OAM) are a very active field of research for their prospective applications, especially at short wavelengths. We consider here such beams produced through high-harmonic generation (HHG) in a rare gas and analyze the characterization of their high charge vortex structure by an EUV (Extreme UltraViolet) Hartmann wavefront sensor. We show that such HHG beams are generally composed of a set of numerous vortex modes. The sensitivity of the intensity and phase of the HHG beam to the infrared (IR) laser aberrations is investigated using a deformable mirror.
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https://hal.archives-ouvertes.fr/hal-02926826
Contributor : Philippe Balcou Connect in order to contact the contributor
Submitted on : Tuesday, September 1, 2020 - 10:07:41 AM
Last modification on : Tuesday, September 14, 2021 - 3:36:59 AM
Long-term archiving on: : Wednesday, December 2, 2020 - 1:09:19 PM

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F. Sanson, A. Pandey, I. Papagiannouli, F. Harms, G. Dovillaire, et al.. Highly multimodal structure of high topological charge extreme ultraviolet vortex beams. Optics Letters, Optical Society of America - OSA Publishing, 2020, 45 (17), pp.4790. ⟨10.1364/OL.397206⟩. ⟨hal-02926826⟩

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