%0 Journal Article
%T Control of ellipticity in high-order harmonic generation driven by two linearly polarized fields
%+ Laboratoire d'optique appliquée (LOA)
%+ Faculty of Physics [MSU, Moscow]
%+ Elettra Sincrotrone Trieste
%+ Sorbonne Université (SU)
%+ Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR)
%+ University of Nova Gorica
%A Mahieu, B.
%A Stremoukhov, S.
%A Gauthier, D.
%A Spezzani, C.
%A Alves, C.
%A Vodungbo, Boris
%A Zeitoun, Philippe
%A Malka, Victor
%A de Ninno, G.
%A Lambert, Guillaume
%< avec comité de lecture
%@ 1050-2947
%J Physical Review A : Atomic, molecular, and optical physics
%I American Physical Society
%V 97
%N 4
%8 2018-04
%D 2018
%R 10.1103/PhysRevA.97.043857
%Z Physics [physics]/Physics [physics]
%Z Physics [physics]/Physics [physics]/Optics [physics.optics]Journal articles
%X We demonstrate experimentally the control of the polarization (ellipticity and polarization axis) of femtosecond high-order harmonics. The method relies on a two-color (omega - 2 omega) configuration, where both omega and 2 omega generating fields have linear polarizations with a variable crossing angle. We correlate our measurements with the conservation rules of energy and linear momentum accounting for harmonic generation in a two-color field. We evidence that the generation process, and especially the number of omega and 2 omega photons absorbed for generating a given harmonic, strongly depends on the crossing angle. Finally, relying on a simple formalism, we derive analytical formulae for calculating both polarization axis and ellipticity of the separate harmonics. The model corroborates our results and represents a base for future investigations.
%G English
%L hal-01818789
%U https://hal-ensta-paris.archives-ouvertes.fr/hal-01818789
%~ X
%~ ENSTA
%~ CNRS
%~ X-LOA
%~ X-DEP
%~ X-DEP-PHYS
%~ LCPMR
%~ ENSTA_LOA
%~ INC-CNRS
%~ UNIV-PARIS-SACLAY
%~ X-SACLAY
%~ ENSTA-SACLAY
%~ SORBONNE-UNIVERSITE
%~ SORBONNE-UNIV
%~ SU-SCIENCES
%~ TEST-HALCNRS
%~ ALLIANCE-SU
%~ TEST2-HALCNRS
%~ CHIMIE-SU