Abstract
The creation of electron Bessel states of large topological charge is discussed in the context of high-energy photoionization. We show that, for short (three cycle) driving pulses of circular polarization and intensities of 5 × 1016 Wcm−2, it is possible to obtain electron vortex states with orbital angular momentum of few thousands units of ℏ. Our analysis is based on the quasi-relativistic strong-field approximation where an additional term, the relativistic mass correction, is accounted for. The effect of this modification, together with the recoil corrections, over the energy spectra of photoelectrons is also analyzed.
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