We report on the dependence of curvilinear shaped coplanar waveguides on the near-field diffraction patterns of spin waves propagating in perpendicularly magnetized thin films. Implementing the propagating spin waves spectroscopy techniques on either concentrically or eccentrically shaped antennas, we show how the link budget is directly affected by the spin wave interference, in good agreement with near-field diffraction simulations. This work demonstrates the feasibility to inductively probe a magnon interference pattern with a resolution down to 1μm2, and provides a methodology for shaping spin wave beams from an antenna design. This methodology is successfully implemented in the case study of a spin wave Young's interference experiment.
@article{arxiv.2309.05532,
title = {Probing Spin Wave Diffraction Patterns of Curved Antennas},
author = {Loic Temdie and Vincent Castel and Vincent Vlaminck and Matthias Benjamin Jungfleisch and Romain Bernard and Hicham Majjad and Daniel Stoeffler and Yves Henry and Matthieu Bailleul},
journal= {arXiv preprint arXiv:2309.05532},
year = {2023}
}