Nonlinear Lateral Spin-Wave Transport in Planar Magnonic Networks

Nonlinear spin-wave transport in lateral magnonic stripes is studied numerically and experimentally. Intensity-dependent spin-wave dynamics and periodic power transfer between stripes is demonstrated. By means of finite-element and micromagnetic numerical simulation, the pronounced variation of the coupling length with the variation of the spin-wave power is shown. Both identical and nonidentical magnonic stripes are considered. A phenomenological model is developed and verified by Brillouin light scattering spectroscopy. The lateral topology of magnonic stripes can be used as a tunable interconnection unit in planar magnonic networks, which acts also as a microwave directional coupler, power divider, and spin-wave demultiplexer.