Effects of ultrashort laser pulses on angular distributions of photoionization spectra.

ABSTRACT: We study the photoelectron spectra by intense laser pulses with arbitrary time dependence and phase within the Keldysh framework. An efficient semianalytical approach using analytical transition matrix elements for hydrogenic atoms in any initial state enables efficient and accurate computation of the photoionization probability at any observation point without saddle point approximation, providing comprehensive three dimensional photoelectron angular distribution for linear and elliptical polarizations, that reveal the intricate features and provide insights on the photoionization characteristics such as angular dispersions, shift and splitting of photoelectron peaks from the tunneling or above threshold ionization(ATI) regime to non-adiabatic(intermediate) and multiphoton ionization(MPI)

SUBMITTER: Ooi CHR 

PROVIDER: S-EPMC5532372 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature