Spin waves are promising candidates for information processing and transmission in a broad frequency range. In the realization of magnonic devices, the frequency depended division of the spin wave frequencies is a critical function for parallel information processing. In this work, we demonstrate a proof-of-concept spin-wave frequency division multiplexing method by magnetizing a homogenous magnetic microstripe with an inhomogeneous field. The symmetry breaking additional field is introduced by a permalloy stripe simply placed in lateral proximity to the waveguide. Spin waves with different frequencies can propagate independently, simultaneously and separately in space along the shared waveguide. This work brings new potentials for parallel information transmission and processing in magnonics.
@article{arxiv.1910.07136,
title = {Spin-Wave frequency division multiplexing in an yttrium iron garnet microstripe magnetized by inhomogeneous field},
author = {Zhizhi Zhang and Michael Vogel and Jose Holanda and M. Benjamin Jungfleisch and Changjiang Liu and Yi Li and John E. Pearson and Ralu Divan and Wei Zhang and Axel Hoffmann and Yan Nie and Valentyn Novosad},
journal= {arXiv preprint arXiv:1910.07136},
year = {2020}
}