title: Imprints of the molecular-orbital geometry on the high-harmonic ellipticity.
abstract: The influence of the orbital symmetry on the ellipticity of the high-order harmonics is investigated. It is found that the ellipticity maps have distinct shapes for the molecular orbitals with different symmetry. Our analysis shows that the feature of the harmonic ellipticity map is essentially determined by the nodal structure of the nonsymmetric orbital. The results indicate that the molecular-orbital geometry is imprinted on the ellipticity of the high-order harmonics, which invites the use of ellipticity measurements as a probe of the orbital structure for polar molecules.
authors.affiliation: Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.
authors.forename: Meiyan
authors.initials: M
authors.lastname: Qin
authors.forename: Xiaosong
authors.initials: X
authors.lastname: Zhu
authors.forename: Kunlong
authors.initials: K
authors.lastname: Liu
authors.forename: Qingbin
authors.initials: Q
authors.lastname: Zhang
authors.forename: Peixiang
authors.initials: P
authors.lastname: Lu
mesh_terms: D003198:Computer Simulation; D008956:Models, Chemical; D057054:Molecular Imaging / Q000379:methods*