Molecular frame photoemission: a sensitive probe of the complete polarization state of high harmonic generation

29th International Conference on Photonic, Electronic, and Atomic Collisions

Veyrinas, K.^1 ; Gruson, V.^2 ; Weber, S.J.^2 ; Barreau, L.^2 ; Ruchon, T.^2 ; Houver, J.C.^1 ; Carré, B.^2 ; Lucchese, R.R.^3 ; Saliéres, P.^2 ; Dowek, D.^1

Institut des Sciences Moléculaires d'Orsay (UMR 8214 CNRS-UniversitéParis-Sud), UniversitéParis-Sud, Bâtiment 350, Orsay

91405, France^1

CEA-Saclay, IRAMIS, Laboratoire Interactions, Dynamique et Lasers, Gif-sur-Yvette

91191, France^2

Department of Chemistry, Texas AandM University, College Station

TX

77840, United States^3

关键词: Anisotropic target;    Dissociative photoionization;    Elliptically polarized light;    Generation process;    High harmonic generation;    High order harmonics;    Inherent symmetry;    Polarization state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/11/112140/pdf
DOI  :  10.1088/1742-6596/635/11/112140

来源: IOP

【 摘 要 】

Molecular polarimetry, based on the determination of molecular frame photoemission in dissociative photoionization (DPI) studied by electron-ion coincident momentum spectroscopy, allows us to measure the complete state of elliptically polarized light. Here, we demonstrate the first complete characterization of high-order harmonic polarization state for three benchmark generation processes with inherent symmetry breaking based on the polarization of the generating beam (elliptical or counter-rotating fields) or on anisotropic targets e.g. aligned molecules. The ability to disentangle circular and unpolarized components of the XUV pulses is of particular interest to qualify the HHG sources.