DOI: 10.3390/magnetochemistry9080199 ISSN: 2312-7481
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- Materials Chemistry
- Chemistry (miscellaneous)
- Electronic, Optical and Magnetic Materials
We propose an experimental method for the unidirectional excitation of spin waves. By structuring Au nanowire 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 nanowire 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 100 μm over the 20 GHz frequency band. The proposed experiment paves the way for future non-reciprocal magnonic devices.