ABSTRACT
This chapter develops a theoretical approach and proposes lateral and vertical topologies of magnonic couplers as candidates to the internode elements in magnonic networks. It considers the features of spin wave (SW) propagation and the formation of forbidden zones for coupled planar and layered SW elements. Theoretical investigation of wave processes in SW waveguides is performed on the basis of a common mathematical approach using the method of coupled waves. This method is well defined under an assumption of single-mode SW propagation and weak interwaveguide coupling. Influence of intermode coupling may be accounted for by numerical simulation of Maxwell's equations by means of the finite element method (FEM) and micromagnetic simulations of high-frequency magnetization dynamics in thin-film magnonic structures in space and time domains. SW transmission and dispersion in the proposed topology of magnonic couplers were investigated by broadband microwave spectroscopy using a vector network analyzer (VNA).
