Chiral Excitation of Exchange Spin Waves Using Gold Nanowire Grating

Loic Temdie; Vincent Castel; Timmy Reimann; Morris Lindner; Carsten Dubs; Gyandeep Pradhan; Jose Solano; Romain Bernard; Hicham Majjad; Yves Henry; Matthieu Bailleul; Vincent Vlaminck

doi:10.20944/preprints202306.1414.v1

A peer-reviewed article of this Preprint also exists.

Temdie, L.; Castel, V.; Reimann, T.; Lindner, M.; Dubs, C.; Pradhan, G.; Solano, J.; Bernard, R.; Majjad, H.; Henry, Y.; Bailleul, M.; Vlaminck, V. Chiral Excitation of Exchange Spin Waves Using Gold Nanowire Grating. Magnetochemistry 2023, 9, 199. Temdie, L.; Castel, V.; Reimann, T.; Lindner, M.; Dubs, C.; Pradhan, G.; Solano, J.; Bernard, R.; Majjad, H.; Henry, Y.; Bailleul, M.; Vlaminck, V. Chiral Excitation of Exchange Spin Waves Using Gold Nanowire Grating. Magnetochemistry 2023, 9, 199.

Abstract

We propose an experimental method for the unidirectional excitation of spin waves. By structuring Au nanowires arrays within a coplanar waveguide onto a thin yttrium iron garnet (YIG) film, we observe a chiral coupling between the excitation field geometry of the nanowires grating and several well-resolved propagating magnon modes. We report a propagating spin wave spectroscopy study with unprecedented spectral definition, wavelengths down to 130 nm and attenuation lengths well above the 100 μm over the 20 GHz frequency band. The proposed experiment paves the way for future non-reciprocal magnonic devices.

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Chiral Excitation of Exchange Spin Waves Using Gold Nanowire Grating

Abstract

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