A selection of reports presented at the VIII International Conference on Ultrafast Optical Phenomena UltrafastLight-2024

Second harmonic generation in the interaction of a dipole electromagnetic pulse with a constant magnetic field

R. M. Feshchenko

P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: We discuss the generation of nonlinear harmonics by an intense dipole electromagnetic pulse in a vacuum in the presence of a constant magnetic field. Using Maxwell’s nonlinear equations, following from the Heisenberg – Euler Lagrangian in the one-loop approximation, expressions are derived for the electromagnetic field of the second harmonic generated in this case. It is shown that the second harmonic pulse in its spatial structure is a magnetic octupole pulse if the initial electromagnetic pulse is an electric- or magnetic-dipole pulse.

Keywords: nonlinear electrodynamics, Heisenberg - Euler Lagrangian, multipole radiation, harmonics.

 English version: Quantum Electronics, 2025, 52:suppl. 3, S308–S312