Fast acquisition of spin-wave dispersion by compressed sensing

Abstract

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.

5 pages, 4 figures

References in corpus (4)

• Realization of XNOR and NAND spin-wave logic gates
• Unidirectional control of optically induced spin waves
• Compressed sensing in scanning tunneling microscopy/spectroscopy for observation of quasi-particle interference
• Observation of evanescent spin waves in the magnetic dipole regime