Particle-in-Cell Simulation of Magnetic Fields Generated from the Interaction of Radially and Azimuthally Polarized Ultra-Intense Short Pulse Laser with Underdense Plasma

Pettawatt-class lasers have stimulated considerable progress in the field of ultra-intense relativistic laser plasma interaction (RLPI) and allowed experiments with complex polarization states. In this work, a three-dimensional (3D) particle-in-cell (PIC) simulation is used to investigate the magnetic fields generated during the interaction of radially and azimuthally polarized ultra-intense lasers with low density target and compared with linear polarization instances. Magnetic reconnexion is highlighted at intensities ranging from 1x10¹⁹ w/cm² to 1x10²¹ w/cm2.