Angular distribution of photoelectrons generated in atomic ionization by twisted radiation

Abstract

Until recently, theoretical and experimental studies of photoelectron angular distributions (PADs) including non-dipole effects in atomic photo\-ionization have been performed mainly for the conventional plane-wave radiation. One can expect, however, that the non-dipole contributions to the angular- and polarization-resolved photo\-ionization properties are enhanced if an atomic target is exposed to twisted light. The purpose of the present study is to develop a theory for PADs to the case of twisted light, especially for many-electron atoms. The theoretical analysis is performed for the experimentally relevant case of macroscopic atomic targets, i.e., when the cross-sectional area of the target is larger than the characteristic transversal size of the twisted beam. For such a scenario, we derive expressions for the angular distribution of the emitted photoelectrons under the influence of twisted Bessel beams. As an illustrative example, we consider helium photo\-ionization in the region of the lowest dipole $2s2p[{{}^{1}P}_1]$ and quadrupole $2p^2[{{}^{1}D}_2]$ autoionization resonances. A noticeable variation of the PAD caused by changing the parameters of the twisted light is predicted.

arXiv commentOne more reference has been added in the Introduction. English throughout the manuscript has been improved

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Cited by in corpus (3)

• Generation of vortex electrons by atomic photoionization
• Vector parameters in atomic ionization by twisted light: polarization of electron and residual ion
• High Harmonic Generation with Orbital Angular Momentum Beams: Beyond-dipole Corrections