  We propose a hybrid magnonic-oscillator system based on the combination of a
spin transfer auto-oscillator and a magnonic waveguide to open new perspectives
for spin-wave based circuits. The system is composed of a spin transfer
oscillator based on a vortex state which is dipolarly coupled to a nanoscale
spin-wave waveguide with longitudinal magnetization. In its auto-oscillating
regime, the oscillator emits coherent spin waves with tunable and controllable
frequencies, directions and amplitudes into the waveguide. We demonstrate the
principle of this method using micromagnetic simulations and show that
reconfiguration of the system is possible by changing the chirality and
polarity of the magnetic vortex. Spin waves are emitted into the waveguide with
high non-reciprocity and the preferred direction depends on the core polarity
of the vortex. In contrast, different vortex chiralities lead to different
amplitudes of the emitted waves. Our findings open up a novel way to design an
agile spintronic device for the coherent and tunable generation of propagating
spin waves.
