Chiral coupling of magnons in waveguides

Tao Yu, Xiang Zhang, Sanchar Sharma, Yaroslav M. Blanter, Gerrit E.W. Bauer

Research output: Contribution to journalArticlepeer-review

Abstract

We theoretically investigate the collective excitation of multiple (sub)millimeter-sized ferromagnets mediated by waveguide photons. By the position of the magnets in the waveguide, the magnon-photon coupling can be tuned to be chiral, i.e., magnons only couple with photons propagating in one direction, leading to asymmetric transfer of angular momentum and energy between the magnets. A large imbalance in the magnon number distribution over the magnets can be achieved with a long chain of magnets, which concentrate at one edge. The chain also supports standing waves with low radiation efficiency that is inert to the chirality.

Original languageEnglish
JournalUnknown Journal
Publication statusPublished - 2019 Sep 4

ASJC Scopus subject areas

  • General

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