Magnonic Waveguides Studied by Microfocus Brillouin Light Scattering

The paradigm of magnonics is based on utilization of propagating spin waves (or their quanta-magnons) for signal transmission and processing in magnetic-field-controlled devices. Implementation of magnonic devices for future-generation microelectronics requires the use of spin-wave guiding structures with micrometer- to nanometer-sized dimensions. Therefore, the deep understanding of propagation, excitation, and control of spin waves in microscopic waveguides is an absolute prerequisite for further developments in the field. Here we review recent experiments on spin-wave propagation in microscopic magnonic waveguides utilizing high-resolution Brillouin light-scattering spectroscopy enabling 2-D visualization of spin waves on the nanoscale.