Spin-wave intermodal coupling in the interconnection of magnonic units

• Published in: Applied physics letters Vol. 112; no. 14
• Main Authors: Sadovnikov, A. V., Grachev, A. A., Gubanov, V. A., Odintsov, S. A., Martyshkin, A. A., Sheshukova, S. E., Sharaevskii, Yu. P., Nikitov, S. A.
• Format: Journal Article
• Language: English
• Published: 02-04-2018
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.5027057

We report experimental investigation of spin-wave transport along combined magnonic structures which are comprised of the
90
°-magnonic bend and adjacent nonidentical magnetic stripes. The latter has the form of a spin-wave coupler. Using space-resolved Brillouin light-scattering spectroscopy and micromagnetic simulations, we study propagation, transformation, and coupling of spin waves in the combined structure. We show that characteristics of spin-wave transport in such structures are defined strongly by the intermodal dipolar spin-wave coupling. The developed structure can operate as a multifunctional magnonic device and can be used to turn the spin wave at
90
° performing the functionality of a directional coupler, a power splitter, a multiplexer, or a frequency separator. Our results show that interconnection of magnonic units can be utilized for further development of planar topologies of insulator-based magnonic networks.