Nanoscale magnonic Fabry-Pérot resonator for low-loss spin-wave manipulation

Huajun Qin (), Rasmus B. Holländer, Lukáš Flajšman, Felix Hermann, Rouven Dreyer, Georg Woltersdorf and Sebastiaan van Dijken ()
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Huajun Qin: Aalto University School of Science
Rasmus B. Holländer: Aalto University School of Science
Lukáš Flajšman: Aalto University School of Science
Felix Hermann: Aalto University School of Science
Rouven Dreyer: Martin Luther University Halle-Wittenberg
Georg Woltersdorf: Martin Luther University Halle-Wittenberg
Sebastiaan van Dijken: Aalto University School of Science

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Active control of propagating spin waves on the nanoscale is essential for beyond-CMOS magnonic computing. Here, we experimentally demonstrate reconfigurable spin-wave transport in a hybrid YIG-based material structure that operates as a Fabry-Pérot nanoresonator. The magnonic resonator is formed by a local frequency downshift of the spin-wave dispersion relation in a continuous YIG film caused by dynamic dipolar coupling to a ferromagnetic metal nanostripe. Drastic downscaling of the spin-wave wavelength within the bilayer region enables programmable control of propagating spin waves on a length scale that is only a fraction of their wavelength. Depending on the stripe width, the device structure offers full nonreciprocity, tunable spin-wave filtering, and nearly zero transmission loss at allowed frequencies. Our results provide a practical route for the implementation of low-loss YIG-based magnonic devices with controllable transport properties.

Date: 2021
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DOI: 10.1038/s41467-021-22520-6

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