An anomalous refraction of spin waves as a way to guide signals in curved magnonic multimode waveguides

Abstract

We present a method for efficient spin wave guiding within the magnonic nanostructures. Our technique is based on the anomalous refraction in the metamaterial flat slab. The gradual change of the material parameters (saturation magnetization or magnetic anisotropy) across the slab allows tilting the wavefronts of the transmitted spin waves and controlling the refraction. Numerical studies of the spin wave refraction are preceded by the analytical calculations of the phase shift acquired by the spin wave due to the change of material parameters in a confined area. We demonstrate that our findings can be used to guide the spin waves smoothly in curved waveguides, even through sharp bends, without reflection and scattering between different waveguide's modes, preserving the phase -- the quantity essential for wave computing.

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Cited by in corpus (9)

• Roadmap on Spin-Wave Computing
• Spin wave dispersion of ultra-low damping hematite ($\alpha {\text{-Fe}}_2{\text{O}}_3$) at GHz frequencies
• Applications of Nanomagnets as Dynamical Systems
• Asymmetric spin wave dispersion due to a saturation magnetization gradient
• Suppression of the skyrmion Hall effect in synthetic ferrimagnets with gradient magnetization
• Comparison of spin-wave transmission in parallel and antiparallel magnetic configurations
• Efficient geometrical control of spin waves in microscopic YIG waveguides
• Control of the phase of reflected spin-waves from magnonic Gires-Tournois interferometer of subwavelength width
• Resonant subwavelength control of the phase of spin waves reflected from a ferromagnetic film edge