Nonlinear spin-Wave Doppler effect for flexible tuning of magnonic frequencies
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866917517638762496 |
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| author | Hou, Jinchen Hu, Shaojie You, Long |
| author_facet | Hou, Jinchen Hu, Shaojie You, Long |
| contents | We theoretically propose a nonlinear spin-wave Doppler effect, in which the time-dependent motion of a magnetic energy boundary acts as an active frequency modulator, directly converting boundary-induced phase dynamics into instantaneous spectral synthesis for propagating spin-wave modes. In contrast to the conventional linear Doppler effect governed by constant relative velocity, this mechanism enables dynamic phase-to-frequency transduction, generating high-order harmonics, magnonic frequency combs, and coherent chirped sidebands, without requiring nonlinear magnon-magnon coupling or multi-magnon scattering. Micromagnetic simulations on voltage-controlled anisotropy boundaries in ferroelectric/ferromagnetic (FE/FM) heterostructures demonstrate that the comb spacing and spectral topology are determined solely by boundary kinematics, confirming direct Doppler phase coupling between boundary motion and spin-wave propagation. These results establish moving magnetic-energy boundaries as a new class of on-chip spectral synthesizers and define a coherent and energy-efficient framework for flexible tuning of magnonic frequencies, fundamentally distinct from traditional passive scattering or nonlinear multi-magnon mechanisms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_02185 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nonlinear spin-Wave Doppler effect for flexible tuning of magnonic frequencies Hou, Jinchen Hu, Shaojie You, Long Applied Physics We theoretically propose a nonlinear spin-wave Doppler effect, in which the time-dependent motion of a magnetic energy boundary acts as an active frequency modulator, directly converting boundary-induced phase dynamics into instantaneous spectral synthesis for propagating spin-wave modes. In contrast to the conventional linear Doppler effect governed by constant relative velocity, this mechanism enables dynamic phase-to-frequency transduction, generating high-order harmonics, magnonic frequency combs, and coherent chirped sidebands, without requiring nonlinear magnon-magnon coupling or multi-magnon scattering. Micromagnetic simulations on voltage-controlled anisotropy boundaries in ferroelectric/ferromagnetic (FE/FM) heterostructures demonstrate that the comb spacing and spectral topology are determined solely by boundary kinematics, confirming direct Doppler phase coupling between boundary motion and spin-wave propagation. These results establish moving magnetic-energy boundaries as a new class of on-chip spectral synthesizers and define a coherent and energy-efficient framework for flexible tuning of magnonic frequencies, fundamentally distinct from traditional passive scattering or nonlinear multi-magnon mechanisms. |
| title | Nonlinear spin-Wave Doppler effect for flexible tuning of magnonic frequencies |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2601.02185 |