Spin-Wave frequency division multiplexing in an yttrium iron garnet microstripe magnetized by inhomogeneous field

TL;DR

This paper demonstrates a novel method for spin-wave frequency division multiplexing in yttrium iron garnet microstripes by using an inhomogeneous magnetic field, enabling parallel magnonic information processing.

Contribution

It introduces a simple inhomogeneous field technique to achieve frequency division multiplexing in spin waves within a single waveguide.

Findings

Different frequencies propagate independently and simultaneously.

The method enables parallel information transmission in magnonics.

Potential for scalable magnonic devices.

Abstract

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.