Spin-wave frequency combs

We experimentally demonstrate the generation of spin-wave frequency combs based on nonlinear interaction propagating spin waves in a microstructured waveguide. By means time- and space-resolved Brillouin light scattering spectroscopy, we show that simultaneous excitation with different frequencies leads to cascade four-magnon events, which ultimately results well-defined combs. Their spectral weight can be tuned by choice amplitude input signals. Furthermore, introduce model for stimulated scattering, describes formation time domain.