Spin-wave modes in a CoFeB magnonic crystal waveguide

摘要

Femtosecond laser pulses are used to excite and measure the magnetization dynamics on a CoFeB magnonic waveguide using the double-modulated pump-probe technique. Damon-Eshbach spin-wave modes are detected on a continuous film when exciting the magnonic crystal. This suggests that the spin waves in the waveguide are induced by the magnonic crystal.