Photoelectron – ion entanglement in streaked and multi-sideband interferometric photoemission: an ab initio approach *

We extended our FE-DVR code for the ab initio calculation of single- and double-ionization [1] to explore the effect of electronic correlation on attosecond time- and emission-angle-resolved photoemission from gaseous helium. Our calculated spectra and relative photoemission time delays for IR streaked direct and shake-up XUV emission to the He+(n=2) channel (i) agree well with experimental and theoretical data in [2] and (ii) allow us to scrutinize the effect of the transient induced dipole moment of the residual excited He+ (n=2,3) ion on photoemission delays.  In addition, we ab initio calculated multi-sideband interferometric spectra from helium to reveal the imprint of photoelectron interactions with the residual ion on laser-driven continuum-continuum transitions and relative phase sidebands shifts.  

 

[1] A. Liu and U. Thumm, “Laser-assisted XUV double ionization of helium: Energy-sharing dependence of joint angular distributions”, Phys. Rev A 91, 043416 (2015).

[2] M. Ossiander et al., “Attosecond correlation dynamics” Nat. Phys. 13, 280 (2017).