Phase-resolved imaging of coherent phonon-magnon coupling
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| Soggetti: | |
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| _version_ | 1866917318177587200 |
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| author | Kunz, Yannik Kraft, Florian Breitbach, David Pfeifer, Torben Küß, Matthias Glamsch, Stephan Albrecht, Manfred Weiler, Mathias |
| author_facet | Kunz, Yannik Kraft, Florian Breitbach, David Pfeifer, Torben Küß, Matthias Glamsch, Stephan Albrecht, Manfred Weiler, Mathias |
| contents | We use a direct phase-resolved optical technique to study the coherence of spin waves (SWs) that are driven by surface acoustic waves (SAWs) via resonant magnetoelastic coupling. For this, we employ a piezoelectric lithium tantalate (LiTaO$_{3}$) substrate, equipped with micropatterned interdigital transducers for SAW excitation, which interact with SWs in a 5 nm thin and 20 $μ$m wide Co$_{40}$Fe$_{40}$B$_{20}$-waveguide. We detect the SAW and the SW using a phase-locked micro-focused optical polarization detection experiment and use the characteristic polarization dependence to separate the SAW and SW signals. Our measurements directly image the resonant and coherent excitation of the SW by the SAW. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_06115 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Phase-resolved imaging of coherent phonon-magnon coupling Kunz, Yannik Kraft, Florian Breitbach, David Pfeifer, Torben Küß, Matthias Glamsch, Stephan Albrecht, Manfred Weiler, Mathias Mesoscale and Nanoscale Physics We use a direct phase-resolved optical technique to study the coherence of spin waves (SWs) that are driven by surface acoustic waves (SAWs) via resonant magnetoelastic coupling. For this, we employ a piezoelectric lithium tantalate (LiTaO$_{3}$) substrate, equipped with micropatterned interdigital transducers for SAW excitation, which interact with SWs in a 5 nm thin and 20 $μ$m wide Co$_{40}$Fe$_{40}$B$_{20}$-waveguide. We detect the SAW and the SW using a phase-locked micro-focused optical polarization detection experiment and use the characteristic polarization dependence to separate the SAW and SW signals. Our measurements directly image the resonant and coherent excitation of the SW by the SAW. |
| title | Phase-resolved imaging of coherent phonon-magnon coupling |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2603.06115 |