Photoelectron angular distribution in bichromatic atomic ionization

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

Grum-Grzhimailo, A.N.^1 ; Gryzlova, E.V.^1 ; Staroselskaya, E.I.^1,2 ; Strakhova, S.I.^1 ; Venzke, J.^3 ; Douguet, N.^3 ; Bartschat, K.^3

Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow

119991, Russia^1

Faculty of Physics, Lomonosov Moscow State University, Moscow

119991, Russia^2

Department of Physics and Astronomy, Drake University, Des Moines

IA

50311, United States^3

关键词: Atomic ionization;    Circularly polarized radiations;    Interference phenomena;    Non-dipole effects;    Photoelectron angular distributions;    Second harmonics;    Theoretical aspects;    Two photon ionization;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/1/012008/pdf
DOI  :  10.1088/1742-6596/635/1/012008

来源: IOP

【 摘 要 】

Theoretical aspects of photoelectron angular distributions are discussed with reference to bichromatic ionization by an FEL beam. Specifically, we consider an asymmetry in the angular distribution due to interference between the ionization paths from the fundamental and the second harmonic. The case of circularly polarized radiation is analyzed in detail in the vicinity of an intermediate resonance in the two-photon ionization paths. Similarities and differences to interference phenomena due to non-dipole effects are also discussed.