Field-controlled phase-rectified magnonic multiplexor

The ability to control the propagation of spin waves in magnonic circuits is crucial for further development of magnonic technology. The majority of the existing control mechanisms are based on the use of electrical current, which is inevitably associated with ubiquitous Ohmic losses and therefore reduced energy efficiency. In this respect, spin-wave control mechanisms utilizing magnetic field and / or inherent micromagnetic memory effects could offer significant benefits to future magnonic technology but are yet to be properly explored. Here, we use a combination of Brillouin light scattering (BLS) and micromagnetic simulations to demonstrate a Y-shaped magnonic multiplexor in which the direction of spin-wave propagation is switched by a modest variation of the orientation of a global bias magnetic field. Furthermore, we show the phase of the transmitted spin wave can be conditioned by varying the width of the output magnonic waveguide.