Laser-induced ionization beyond the dipole approximation in the nearly relativistic regime

In this research, a new approach of utilizing a 3D Fourier-Transform-assisted Trotter-Suzuki method of time propagation combined with vast cloud computing resources was proposed and used to develop novel theoretical and computational tools capable of simulating ionization induced by nearly relativistic laser fields. Various corrections were included such as the relativistic mass correction and the Nordesick correction, the latter of which accounts for the electron recoil during the absorption of laser photons. The features of the photoelectron distributions change dramatically when the effects of radiation pressure on ionization are considered, which means that they must be included whenever the intensities of the laser fields become relativistically intensive.