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Updated: Jan 14, 2026

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Scaling laws of magnetically driven high-order harmonic generation in spin-orbit coupled systems
1Université de Nouakchott, Faculté des Sciences et Techniques, Département de Physique, Avenue du Roi Faiçal, 2373 Nouakchott, Mauritania.
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We investigate the scaling behavior of high harmonic generation (HHG) driven by magnetic dynamics in spin-orbit coupled systems. In contrast to optically driven HHG-where the harmonic cutoff scales asω-3with the driving frequencyω-our time-dependent quantum transport simulations reveal a qualitatively distinct scaling law for magnetically driven HHG in the presence of spin-orbit interaction: the harmonic cutoffnmaxscales asω-1. This fundamental difference arises from distinct excitation mechanisms-namely, spin-flip transitions driven by vectorial magnetic precession, as opposed to scalar electric fields. Furthermore, we demonstrate that the precession cone angleθserves as a crucial control parameter. Increasingθbroadens the harmonic bandwidth, with peak emission achieved for nearly in-plane magnetic dynamics. Our findings establish magnetically driven HHG as a robust and tunable mechanism for nonlinear spin transport, governed by unique scaling laws with potential applications in ultrafast spintronic technologies.
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