Optimized Magnetization Dynamics in Magnonic Nanograting Filters*

On-chip integration for compact microwave data communication, data storage, and information transfer in ferromagnetic waveguides might be enabled by spin signal processing in the GHz bands, such as filtering, frequency multiplication, and excitation. On the nanoscale, magnonic crystals (MCs) might be used to construct many of these functions inside the same physically defined structure. MCs and gratings could enable tunable spin-wave filters, logic, and frequency multiplier devices. We explore the impact of nanowire damping, excitation frequency, and geometry on the spin wave modes, spatial and temporal transmission profiles, and external current and magnetic fields for finite patterned nanogratings. Higher frequency spin wave modes are transmitted with higher intensities when the nanowire is stimulated by stronger external RF fields. Changing the width, pitch, and number of periods of a nanowire grating can assist shift transmitted frequencies throughout the super high-frequency range. In magnetic nanowires, our approach might allow for spin-wave frequency multipliers, selective filtering, excitation, and suppression. Our work might shed light on magnon dynamics and spectral features in thin film MCs.