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The excitation of high-frequency short-wavelength spin waves is a challengelimiting the application of these propagating magnetization disturbances ininformation processing systems. We propose a method of local excitation of thehigh-frequency spin waves using the non-linear nature of magnetizationdynamics. We demonstrate with numeric simulations that an edge-localized spinwave can be used to excite plane waves propagating obliquely from the film'sedge at a doubled frequency and over twice shorter in wavelength. Theexcitation mechanism is a direct result of the ellipticity of the magneticmoments precession that is related to the edge-mode propagation. As aconsequence, the magnetization component tangential to the equilibriumorientation oscillates with doubled temporal and spatial frequencies, whichleads to efficient excitation of the plane spin waves. Threshold-lessnon-linear process of short-wavelength spin-wave excitation proposed in ourstudy is promising for integration with an inductive or point-like spin-torquesource of edge spin waves.

Local non-linear excitation of sub-100 nm bulk-type spin waves by edge-localized spin waves in magnetic films