Autler-Townes Effects in Attosecond Circular Polarization Molecular Photoionization

17th International Conference on Recent Progress in Many-Body Theories

Yuan, Kai-Jun^1 ; Sun, Zhigang^2,3 ; Bandrauk, André D^1

Laboratoire de Chimie Théorique, Faculté des Sciences, Université de Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada^1

State Key Laboratory of Molecular Reaction Dynamics, Center for Theoretical and Computational Chemistry, Chinese Academy of Sciences, Dalian 116023, China^2

Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China^3

关键词: Autler-townes splitting;    Circularly polarized;    Coherent electron waves;    Extreme ultraviolet lasers;    Molecular photoionization;    Photoelectron angular distributions;    Population oscillation;    Time dependent Schrodinger equation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/529/1/012004/pdf
DOI  :  10.1088/1742-6596/529/1/012004

来源: IOP

【 摘 要 】

We present molecular photoionization simulations by intense (I ∼ 1016W/cm2) few cycle circularly polarized attosecond extreme ultraviolet laser pulses for aligned H2+from numerical solutions of the corresponding time-dependent Schrodinger equation. With appropriate laser pulse parameters, circular attosecond coherent electron wave packets (CEWPs) are created in excited Rydberg states. Such CEWPs are spatially localized during ionization processes, thus resulting in sufficient population oscillations between the resonant excited Rydberg states and the initial ground state. Consequently Autler-Townes splitting in circular polarization energy spectra is predicted, which is shown to be critically sensitive to the pulse intensity, duration, and polarization. The resulting photoelectron angular distributions are rotated with respect to the molecular axis due to the nonspherical Coulomb potential of the molecule, resulting in different ionization rates at different laser polarization-molecular angles.