We present a near-field diffraction model for spin waves in perpendicularly magnetized films applicable in any geometries of excitation fields. This model relies on Kalinikos-Slavin formalism to express the dynamic susceptibility tensor in k-space, and calculate the diffraction patterns via inverse 2D-Fourier transform of the response functions. We show an excellent quantitative agreement between our model and MuMax3 micro-magnetic simulations on two different geometries of antennas. Our method benchmarks spin wave diffraction in perpendicularly magnetized films, and is readily applicable for future designs of magnon beamforming and interferometric devices.
@article{arxiv.2211.07231,
title = {Spin wave diffraction model for perpendicularly magnetized films},
author = {V. Vlaminck and L. Temdie and V. Castel and M. B. Jungfleisch and D. Stoeffler and Y. Henry and M. Bailleul},
journal= {arXiv preprint arXiv:2211.07231},
year = {2023}
}