Extreme-ultraviolet vector-vortex beams with tunable topological charge and polarization distribution

Alok Kumar Pandey; Alba De Las Heras Munoz; Julio San Roman; Francisco Javier Serrano Rodriguez; Elsa Baynard; Guillaume Dovillaire; Moana Pittman; Charles G. Durfee; Luis Plaja; Sophie Kazamias; Carlos Hernández García; Olivier Guilbaud

doi:10.1117/12.3022757

18 June 2024 Extreme-ultraviolet vector-vortex beams with tunable topological charge and polarization distribution

Alok Kumar Pandey, Alba De Las Heras Munoz, Julio San Roman, Francisco Javier Serrano Rodriguez, Elsa Baynard, Guillaume Dovillaire, Moana Pittman, Charles G. Durfee, Luis Plaja, Sophie Kazamias, Carlos Hernández García, Olivier Guilbaud

Author Affiliations +

Proceedings Volume 13024, Optical Instrument Science, Technology, and Applications III; 1302405 (2024) https://doi.org/10.1117/12.3022757
Event: SPIE Optical Systems Design, 2024, Strasbourg, France

Abstract

In this work, we exploit HHG in a noble gas to merge the azimuthally twisted wavefront of a vortex beam and the spatially varying polarization of a vector beam, yielding EUV vector-vortex beams (VVB) that are tailored simultaneously in their SAM and OAM. Employing a high-resolution EUV Hartmann wavefront sensor (EUV HASO, Imagine Optic), we perform the complete spatial intensity and wavefront characterization of the vertical polarization component of the 25th harmonic beam centered at a wavelength of 32.6 nm. By driving the HHG using IR VVB, we show that HHG enables the production of EUV VVB exhibiting radial, azimuthal, or even intermediate polarization distribution. Furthermore, the wavefront characterization allows for the unambiguous confirmation of the topological charge and OAM helicity of the upconverted harmonic VVB. Notably, our work reveals that HHG provides a means for the synchronous and controlled manipulation of SAM and OAM. The production of ultrafast EUV VVB with high OAM and adjustable polarization distributions opens up promising prospects for their applications at nanometric spatial and sub-femtosecond temporal resolutions using a table-top harmonic source.

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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Alok Kumar Pandey, Alba De Las Heras Munoz, Julio San Roman, Francisco Javier Serrano Rodriguez, Elsa Baynard, Guillaume Dovillaire, Moana Pittman, Charles G. Durfee, Luis Plaja, Sophie Kazamias, Carlos Hernández García, and Olivier Guilbaud "Extreme-ultraviolet vector-vortex beams with tunable topological charge and polarization distribution", Proc. SPIE 13024, Optical Instrument Science, Technology, and Applications III, 1302405 (18 June 2024); https://doi.org/10.1117/12.3022757

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KEYWORDS

Extreme ultraviolet

Polarization

Wavefronts

Angular momentum

Noble gases

Structured light

Temporal resolution

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