Sustained Amplification of Coherent Spin Waves by Parametric Pumping with Surface Acoustic Waves
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912493134151680 |
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| author | Rivard, Carson Jander, Albrecht Dhagat, Pallavi |
| author_facet | Rivard, Carson Jander, Albrecht Dhagat, Pallavi |
| contents | Parametric amplification offers a route to overcoming intrinsic damping in spin-wave systems, a key challenge in the development of magnonic signal processing and computing technologies. Here we demonstrate the sustained amplification of coherent forward volume magnetostatic spin waves in a yttrium-iron-garnet thin film using a traveling surface acoustic wave as a nonstationary pump. A gain of up to 6 dB is achieved under continuous pumping below the threshold for parametric instability. The interaction generates an idler wave at a distinct frequency, consistent with three-wave mixing governed by energy and momentum conservation. This approach enables stable, frequency- and wavevector-selective spin-wave gain using practical pump power levels, establishing acoustic wave pumping as a viable mechanism for realizing active components in integrated magnonic circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_15023 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Sustained Amplification of Coherent Spin Waves by Parametric Pumping with Surface Acoustic Waves Rivard, Carson Jander, Albrecht Dhagat, Pallavi Other Condensed Matter Mesoscale and Nanoscale Physics Parametric amplification offers a route to overcoming intrinsic damping in spin-wave systems, a key challenge in the development of magnonic signal processing and computing technologies. Here we demonstrate the sustained amplification of coherent forward volume magnetostatic spin waves in a yttrium-iron-garnet thin film using a traveling surface acoustic wave as a nonstationary pump. A gain of up to 6 dB is achieved under continuous pumping below the threshold for parametric instability. The interaction generates an idler wave at a distinct frequency, consistent with three-wave mixing governed by energy and momentum conservation. This approach enables stable, frequency- and wavevector-selective spin-wave gain using practical pump power levels, establishing acoustic wave pumping as a viable mechanism for realizing active components in integrated magnonic circuits. |
| title | Sustained Amplification of Coherent Spin Waves by Parametric Pumping with Surface Acoustic Waves |
| topic | Other Condensed Matter Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2507.15023 |