Polarization of attosecond pulses generated by two-color laser fields. Issue 7 (January 2020) - Zhu, M F
Synopsis: We propose a circular-elliptical laser field, which consists of a circularly polarized field with its copla-nar counter-rotating elliptical third harmonic pulse, to generate polarized high-order harmonics and attosecond pulses (APs) by He atom. We show that the polarization of APs depends evidently on the ellipticity ξ of harmonic laser field. Most importantly, nearly circular APs can be obtained with a proper ξ . Our results contribute to the generation of high elliptically polarized APs with s-state atom.