Analytical expression of the magneto-optical Kerr effect and Brillouin light scattering intensity arising from dynamic magnetization

摘要

Time-resolved magneto-optical Kerr effect (MOKE) and Brillouin lightscattering (BLS) spectroscopy are important techniques for the investigation ofmagnetization dynamics. Within this article, we calculate analytically the MOKEand BLS signals from prototypical spin-wave modes in the ferromagnetic layer.The reliability of the analytical expressions is confirmed by optically exactnumerical calculations. Finally, we discuss the dependence of the MOKE and BLSsignals on the ferromagnetic layer thickness.