Magnon Accumulation in Chirally Coupled Magnets

TL;DR

This paper demonstrates strong chiral magnon-photon coupling in microwave waveguides with magnet chains, leading to significant magnon accumulation at one edge, which could enable new applications in nonlinear and quantum magnonics.

Contribution

It introduces a novel mechanism for magnon accumulation via chiral coupling in microwave waveguides with magnet chains, advancing the understanding of magnon-photon interactions.

Findings

Large magnon accumulations observed at one edge of the chain.

Chiral coupling enables directional control of magnons.

Potential for new functionalities in nonlinear and quantum magnonics.

Abstract

We report strong chiral coupling between magnons and photons in microwave waveguides that contain chains of small magnets on special lines. Large magnon accumulations at one edge of the chain emerge when exciting the magnets by a phased antenna array. This mechanism holds the promise of new functionalities in non-linear and quantum magnonics.