A lens, a device transforming propagation directions in an organized fashion, is one of the fundamental tools for wave manipulation. Spin wave, the collective excitation of ordered magnetizations, stands out as a promising candidate for future energy-saving information technologies. Here we propose theoretically and verify by micromagnetic simulations, that an antiferromagnetic skyrmion naturally serves as a lens for spin wave, when the Dzyaloshinskii-Moriya strength exceeds a threshold. The underlying mechanism is the spin wave deflection caused by Dzyaloshinskii-Moriya interaction, a mechanism that is ordinarily overshadowed by the magnetic topology.
@article{arxiv.2511.05905,
title = {Antiferromagnetic skyrmion as a magnonic lens},
author = {Hongbin Wu and Zi-Wu Wang and Jin Lan},
journal= {arXiv preprint arXiv:2511.05905},
year = {2025}
}