For the realization of magnonic devices, spin-wave dispersions need to be identified. Recently, the time-resolved pump-probe imaging method combined with the Fourier transform was demonstrated for obtaining the dispersions in the lower-wavenumber regime. However, the measurement takes a long time when the sampling rate is sufficiently high. Here, we demonstrated the fast acquisition of spin-wave dispersions by using the compressed sensing technique. Further, we quantitatively evaluated the consistency of the results. Our results can be applied to other various pump-probe measurements, such as observations based on the electro-optical effects.

中文翻译：

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通过压缩感知快速获取自旋波色散

为了实现磁子器件，需要识别自旋波色散。最近，结合傅立叶变换的时间分辨泵浦探针成像方法被证明用于获得较低波数区域的色散。然而，当采样率足够高时，测量需要很长时间。在这里，我们展示了使用压缩传感技术快速获取自旋波色散。此外，我们定量评估了结果的一致性。我们的结果可以应用于其他各种泵浦探针测量，例如基于电光效应的观察。