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We report on the electrical detection of a hybrid magnon-photon system, whichis comprised of a magnetic sample coupled to a planar cavity. While the uniformKittel mode has the largest coupling strength among all the magnon modes, itonly generates a modest voltage signal by means of inverse spin-Hall effect. Wehave found that the generated voltage can be significantly enhanced byintroducing a higher order magnon mode, which possesses a much higher spinpumping efficiency and furthermore, it is nearly degenerated with the Kittelmode. The experimental results can be explained by our theoretical model, andsuggest that the use of an auxiliary magnon mode can realize the configurationof a magnon-photon system with both strong coupling and large spin current.

Electrical detection of magnon-photon interaction via auxiliary spin wave mode