Frequency-selective spin-wave propagation in magnonic waveguide with a local laser-heated region

We report on the spin-wave propagation along a magnonic waveguide with a local area of decreased magnetization, which is induced by heating produced with a focused laser spot. A phase-sensitive Brillouin light scattering technique is used to image how the spin wave propagates along the waveguide with a local heat landscape. Frequency-selective signal propagation along the waveguide is demonstrated. Micromagnetic simulations reveal intermodal interference variation in the region after the heated area. The proposed way to reconfigure the magnetization landscape can be used in magnonic devices with frequency-selective spin-wave transport.

Automated summary

We investigate the propagation of spin waves along a magnonic waveguide by inducing a local decrease in magnetization using a focused laser spot. Utilizing the phase-sensitive Brillouin light scattering technique, we image how the spin waves propagate along the waveguide with a local heat landscape. Experimental results demonstrate frequency-selective signal propagation along the waveguide. Micromagnetic simulations reveal changes in intermodal interference after the heated area. The proposed method of reconfiguring the magnetization landscape has potential applications in magnonic devices with frequency-selective spin wave transport.