Extended Data Fig. 7: Ultrafast magnetization precession in YIG.
Time-resolved magnetization precession induced by the femtosecond pump pulses in YIG film. The out-of-plane component of the magnetization is detected with the help of time-resolved magneto-optical Faraday rotation. (a) The magnetization precession measured using different pump wavelengths in the range from 8 μm to 17 μm. (b) Dependence of the normalized precession amplitude on the pump wavelength (black points) and magnetization switching (blue points) from Fig. 2. The normalized precession amplitude is calculated as the ratio of the precession amplitude to the maximal amplitude obtained for 14 um pump laser-induced with pump fluence 0.06 J·cm−2. The red solid lines are fits of damped harmonic oscillations. The frequency of the precession for different pump wavelengths is constantly 4.54 ± 0.25 GHz.
