Edge Mode Coupling and Controlled Propagation in YIG Microstructures for Magnonic Logic
Vitalii A. Boldyrev¹, Alexandr V. Sadovnikov¹; ¹Saratov State University, Saratov, Russia
Abstract
Magnonic microstructures based on yttrium iron garnet (YIG) are promising for compact wave-based information processing due to the low damping of spin waves and the possibility of controlling their propagation by geometry, frequency, and external magnetic fields. In this work, edge-mode coupling and controlled spin-wave propagation in YIG microstructures are investigated using micromagnetic simulations, with additional comparison to experimental Brillouin light scattering data for selected configurations.
For laterally coupled YIG waveguides, edge modes localized near the side boundaries exhibit periodic energy transfer between neighboring channels due to dipolar interaction. In the frequency range 1.90–2.00 GHz, the coupling length increases monotonically with frequency, which is associated with stronger edge localization and reduced overlap of the dynamic magnetization fields. This behavior provides a mechanism for frequency-selective routing of spin-wave signals.
In a two-level microstructure, the direction and distribution of spin-wave energy can be controlled by changing the orientation and polarity of the external magnetic field. The calculated redistribution of the signal between output channels is qualitatively supported by Brillouin light scattering measurements. These effects enable controllable switching between propagation paths without changing the device geometry.
The obtained results demonstrate that edge-mode coupling and field-controlled propagation can serve as functional mechanisms for magnonic logic based on amplitude and phase encoding of spin-wave signals.
Speaker
BOLDYREV VITALII ALEKSANDROVICH
Saratov State University
RUSSIA
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