Work

Method of analysis of the spectra obtained by microfocused Brillouin light scattering

Year: 2025

Type: article

Abstract: In microfocused Brillouin light scattering ($\ensuremath{\mu}$-BLS), light focusing accelerates the measurement, but also merges the response of different spin-wave modes into a single spectrum. To disentangle the contribution of each spin wave, this manuscript reports a comprehensive theoretical model that treats the measured signal as the sum of all back-scattered contributions captured by the microscope objective. Applied to a 50-nm CoFeB film, it reveals how optical parameters, spin-wave dispersion, and mode profiles shape the intensity and line shape of $\ensuremath{\mu}$-BLS.

Source: Physical review. B./Physical review. B

DOI: 10.1103/qlz3-1f1h

Authors: N. Benaziz, T. Devolder, J-P. Adam

Institution: Centre de Nanosciences et de Nanotechnologies

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Agence Nationale de la Recherche

Awards: MAgneto-elastic coupling eXploitation for tunable and non-reciprocal rf Surface Acoustic Wave devices, Paris-Saclay multidisciplinary Nano-Lab, Advanced characterization facilities, Spin waves for advanced signal processing