Nonlinear Bethe-Heitler Pair Creation in an Intense Two-Mode Laser Field

22nd International Laser Physics Workshop

Augustin, Sven^1,2 ; Müller, Carsten^1,2

Institut für Theoretische Physik i, Heinrich-Heine-Universität, 40225 Düsseldorf, Germany^1

Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany^2

关键词: Bichromatic laser fields;    Electron-positron pair creation;    Elliptical polarization;    Laser frequency;    Monochromatic lasers;    Nuclear Coulomb field;    Pair production;    Quantum interference effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/497/1/012020/pdf
DOI  :  10.1088/1742-6596/497/1/012020

来源: IOP

【 摘 要 】

We investigate electron-positron pair creation in the interaction of a nuclear Coulomb field and a highly intense two-mode laser field. For bichromatic laser fields, we examine the differences arising for commensurable and incommensurable frequencies in a continuous variation of the laser frequency ratio and the quantum interference effects, which may occur in the commensurable case. We show that the interference manifests in the angular distributions and the total pair-production rates of the created particles. Additionally, by varying the amplitudes of the two modes we study pair creation in a monochromatic laser wave of arbitrarily elliptical polarization.