Phase-dependent parametric amplification of propagating spin waves in YIG nanostructures enabled by local inhomogeneities
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866918535124484096 |
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| author | Lentfert, Akira Spindler, Ephraim Heinz, Björn Weiler, Mathias Pirro, Philipp |
| author_facet | Lentfert, Akira Spindler, Ephraim Heinz, Björn Weiler, Mathias Pirro, Philipp |
| contents | As magnonics evolves towards non-conventional computing, the development of phase-conserving and phase-sensitive amplification mechanisms becomes increasingly important. A particularly promising approach is non-adiabatic parametric amplification. In this work, the influence of local inhomogeneities on the parallel parametric amplification of spin waves in nano-scale Yttrium Iron Garnet waveguides is investigated. Micromagnetic simulations reveal that in larger pump regions, where only adiabatic amplification is expected, scattering centers provide additional linear momentum that enables non-adiabatic amplification of propagating spin waves. Importantly, the coherence of the process remains unaffected by the scattering and the generation of co-propagating spin waves enhance the effective amplification. Our simulations are confirmed by micro-focused Brillouin light scattering spectroscopy experiments, reproducing both the phase-dependent behavior and the characteristic features of the time-resolved dynamics. These findings demonstrate the flexibility of the parametric amplification process and provide a key mechanism for the development of large-scale spin-wave computing circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2606_02139 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Phase-dependent parametric amplification of propagating spin waves in YIG nanostructures enabled by local inhomogeneities Lentfert, Akira Spindler, Ephraim Heinz, Björn Weiler, Mathias Pirro, Philipp Other Condensed Matter As magnonics evolves towards non-conventional computing, the development of phase-conserving and phase-sensitive amplification mechanisms becomes increasingly important. A particularly promising approach is non-adiabatic parametric amplification. In this work, the influence of local inhomogeneities on the parallel parametric amplification of spin waves in nano-scale Yttrium Iron Garnet waveguides is investigated. Micromagnetic simulations reveal that in larger pump regions, where only adiabatic amplification is expected, scattering centers provide additional linear momentum that enables non-adiabatic amplification of propagating spin waves. Importantly, the coherence of the process remains unaffected by the scattering and the generation of co-propagating spin waves enhance the effective amplification. Our simulations are confirmed by micro-focused Brillouin light scattering spectroscopy experiments, reproducing both the phase-dependent behavior and the characteristic features of the time-resolved dynamics. These findings demonstrate the flexibility of the parametric amplification process and provide a key mechanism for the development of large-scale spin-wave computing circuits. |
| title | Phase-dependent parametric amplification of propagating spin waves in YIG nanostructures enabled by local inhomogeneities |
| topic | Other Condensed Matter |
| url | https://arxiv.org/abs/2606.02139 |