Chiral coupling of magnons in waveguides

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説明

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.

16 pages, 5 figures

収録刊行物

  • Physical Review B

    Physical Review B 101 (9), 094414-, 2020-03-11

    American Physical Society (APS)

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