Photoelectron angular distributions in bichromatic atomic ionization induced by circularly polarized VUV femtosecond pulses
Nicolas Douguet, Alexei N. Grum-Grzhimailo, Грызлова Елена Владимировна +3 more
We investigate two-pathway interferences between nonresonant one-photon and resonant two-photon ionization of atomic hydrogen. In particular, we analyze in detail the photoionization mediated by the fundamental frequency and the second harmonic of a femtosecond VUV pulse when the fundamental is tuned near an intermediate atomic state. Following our recent study [Phys. Rev. A 91, 063418 (2015)] of such effects with linearly polarized light, we analyze a similar situation with circularly polarized radiation. As a consequence of the richer structure in circularly polarized light, characterized by its right-handed or left-handed helicity, we present and discuss various important features associated with the photoelectron angular distribution.
Physical Review A•Mar 2, 2016•64 citations