Spectral filtering of high-order harmonics via optics-free focusing

0546698 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Veyrinas, K. - Vábek, Jan - Valentin, C. - Descamps, D. - Péjot, C. - Burgy, F. - Constant, E. - Mével, E. - Catoire, F.
Spectral filtering of high-order harmonics via optics-free focusing.
Optics Express. Roč. 29, č. 19 (2021), s. 29813-29827. ISSN 1094-4087
Výzkumná infrastruktura: ELI Beamlines III - 90141
Institucionální podpora: RVO:68378271
Klíčová slova: high-harmonic generation * XUV optics * laser-matter interaction * XUV spectral filtering
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.833, rok: 2021
Způsob publikování: Open access

Controlling the wavefront of an extreme ultraviolet (XUV) high-order harmonic beam during the generation process offers the capability of modifying the beam properties without resorting to any XUV optics. By characterizing the XUV intensity profile and wavefront, we quantitatively retrieve both the size and the position of the waist of each harmonic generated in an argon jet. We show that optics-free focusing can occur under specific generating conditions leading to XUV focii of micrometer size. We also demonstrate that each focus is located at distinct longitudinal positions. Using this remarkable XUV wavefront control combined with near focus spatial selection, we experimentally demonstrate efficient and adjustable spectral filtering of the XUV beam, along with a strong rejection of the fundamental beam, without using any XUV optics.
Trvalý link: http://hdl.handle.net/11104/0323782