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

27 Citations (Scopus)


We theoretically investigate the collective excitations 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 an asymmetric transfer of angular momentum and energy between the magnets. A large enhancement of the magnon number population can be achieved at an edge of a long chain of magnets. The chain also supports standing waves with low radiation efficiency that are inert to the chirality.

Original languageEnglish
Article number094414
JournalPhysical Review B
Issue number9
Publication statusPublished - 2020 Mar 1


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