YIG薄膜中的自旋波聚焦光束

2020 International Conference on Actual Problems of Electron Devices Engineering (APEDE) Pub Date : 2020-09-24 DOI:10.1109/APEDE48864.2020.9255623

G. Dudko, A. Kozhevnikov, V. Sakharov, Y. Khivintsev, S. Vysotskii, M. Madami, G. Gubbiotti, A. Khitun, Y. Filimonov

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引用次数: 0

摘要

采用微磁模拟和Mandelstam- Brillouin光散射技术，研究了自旋波(SW)聚焦光束在切向磁化钇铁石榴石(YIG)薄膜中受曲线聚焦换能器激励的传播和干涉。结果表明，由于SW在切向磁化薄膜中的各向异性传播，SW强度的二维图表现出非倒易特性，相对于聚焦换能器的光轴不具有镜像对称性。由于聚焦换能器的色差和焦散的形成，聚焦后SW光束的干涉模式依赖于激发频率，并且对YIG薄膜中的局部不均匀性很敏感。研究结果表明，基于磁光的信息技术可以使用曲线SW聚焦换能器。

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Spin Waves Focused Beams in YIG Films

Spin waves (SW) focused beams propagation and interference under excitation by curvilinear focusing transducers in tangentially magnetized yttrium iron garnet (YIG) films were studied using micromagnetic simulations and Mandelstam- Brillouin light scattering technique. It is shown that due to anisotropic SW propagation in tangentially magnetized films the two-dimensional maps of SW intensity exhibit nonreciprocal properties without mirror symmetry with respect to optic axis of the focusing transducers. Due to chromatic aberration and caustics formation of the focusing transducers, the interference pattern of the focused SW beams depends on excitation frequency and is sensitive to local nonuniformities in YIG film. The obtained results demonstrate possibility to use curvilinear SW focusing transducers for information technologies based on magnonic optics.

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2020 International Conference on Actual Problems of Electron Devices Engineering (APEDE)

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