Quantification of a propagating spin-wave-packet created by an ultrashort laser pulse in a thin film of magnetic metal

Abstract

Coherent spin-wave generation by focused ultrashort laser pulse irradiation was investigated for a permalloy thin film at micrometer scale using an all-optical space and time-resolved magneto-optical Kerr effect. The spin-wave packet propagating perpendicular to magnetization direction was clearly observed, however that propagating parallel to the magnetization direction was not observed. The propagation length, group velocity, center frequency, and packet-width of the observed spin-wave packet were evaluated and quantitatively explained in terms of the propagation of a magneto-static spin-wave driven by ultrafast change of an out-of-plane demagnetization field induced by the focused-pulse laser.

References in corpus (4)

• Realization of XNOR and NAND spin-wave logic gates
• Spin wave nonreciprocity for logic device applications
• Phase reciprocity of spin-wave excitation by a microstrip antenna
• Interference of coherent spin waves in micron-sized ferromagnetic waveguides

Cited by in corpus (17)

• An Introduction to Spin Wave Computing
• Frequency and wavenumber selective excitation of spin waves through coherent energy transfer from elastic waves
• Femtosecond laser pulse driven caustic spin wave beams
• Optical excitation of propagating magnetostatic waves in an epitaxial Galfenol film by an ultrafast magnetic anisotropy change
• Route toward high-speed nano-magnonics
• Optical excitation of single- and multi-mode magnetization precession in Galfenol nanolayers
• Observation of evanescent spin waves in the magnetic dipole regime
• Sustained coherent spin wave emission using frequency combs
• Dispersionless propagation of ultra-short spin-wave pulses in ultrathin yttrium iron garnet waveguides
• A two-color dual-comb system for time-resolved measurements of ultrafast magnetization dynamics using triggerless asynchronous optical sampling
• Free-standing and positionable microwave antenna device for magneto-optical spectroscopy experiments
• Phase-resolved Spin-Wave Tomography
• Unidirectional propagation of spin waves excited by femtosecond laser pulses in a planar waveguide
• Femtosecond laser comb driven perpendicular standing spin waves
• Optimizing Time-resolved Magneto-optical Kerr Effect for High-fidelity Magnetic Characterization
• Two-dimensional dispersion of magnetostatic volume spin waves
• Nonlinear suppression of dispersion broadening of ultrashort spin-wave pulses in thin YIG films