Excitation of Spin Waves in Ferrimagnetic Alloy via Optical Transient Grating Spectroscopy
The investigation of spin waves provides fundamental insights into magnetic materials and is essential for advancing spintronic and magnonic technologies. The Transient Grating (TG) technique, a four‐wave mixing method, has been widely used to study collective excitations at controlled wave vectors on the micron to nanometer scale. This study presents an all‐optical TG approach for exciting standing dipolar spin waves with a controlled in‐plane wave vector in a ferrimagnetic Co 78 Gd 22 thin film, with potential applicability to a broad range of materials. Spin waves with a wavelength of 2.5 μm are excited by the interference of two coherent laser pulses on the sample surface and probed through the diffraction of a third laser pulse. Polarization analysis separates magnetic and thermoelastic signals and enables time‐resolved measurements of the spin‐wave dynamics.
Authors
- Clemens von Korff Schmising (ORCID: https://orcid.org/0000-0003-3159-3489)
- Deepak Dagur (ORCID: https://orcid.org/0000-0002-6825-8337)
- G. Rossi (ORCID: https://orcid.org/0000-0002-5588-1306)
- G. Panaccione (ORCID: https://orcid.org/0000-0003-0122-4041)
- Marta Brioschi (ORCID: https://orcid.org/0000-0002-5947-8557)
- Stefano Bonetti (ORCID: https://orcid.org/0000-0001-9352-2411)
- Giovanni Vinai
- Riccardo Cucini (ORCID: https://orcid.org/0000-0001-8516-1409)
- Pietro Carrara (ORCID: https://orcid.org/0000-0002-1937-7591)
- Nupur N. Khatu (ORCID: https://orcid.org/0009-0008-4970-0549)
- Alexei A. Maznev
- Peter R. Miedaner
- Nadia Berndt
- Dieter Engel
Institutions
- Centre National de la Recherche Scientifique (FR)
- University of Trieste (IT)
- Ca' Foscari University of Venice (IT)
- University of Milan (IT)
- Elettra-Sincrotrone Trieste S.C.p.A. (IT)
- Sorbonne Université (FR)
- Istituto Officina dei Materiali (IT)
- Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy (DE)
- Institut des NanoSciences de Paris (FR)
- Massachusetts Institute of Technology (US)
- European X-Ray Free-Electron Laser (DE)
Publication Details
- Journal
- Advanced Photonics Research
- Published
- 2026-02-01
- DOI
- https://doi.org/10.1002/adpr.202500233
- Primary Topic
- Magneto-Optical Properties and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- European Commission
- Ministero degli Affari Esteri e della Cooperazione Internazionale
- Office of Science
- Basic Energy Sciences