Fast acquisition of spin-wave dispersion by compressed sensing

TL;DR

This paper introduces a compressed sensing approach to rapidly acquire spin-wave dispersion data, significantly reducing measurement time and enabling faster characterization of magnonic devices.

Contribution

The study demonstrates the application of compressed sensing to accelerate spin-wave dispersion measurements, improving efficiency over traditional Fourier transform methods.

Findings

Achieved faster spin-wave dispersion acquisition using compressed sensing.

Validated the consistency of the compressed sensing results.

Potentially applicable to other pump-probe measurement techniques.

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.