We demonstrate spin pumping driven by a strongly coupled magnon-photon system using a ferromagnet-coplanar superconducting resonator hybrid system at 1.4 K. Electrical readout via the inverse spin-Hall effect reveals characteristic coupling features, including mode splitting and linewidth broadening, demonstrating the electrical detection of strongly coupled microwave photons and magnons. The magnon-photon coupling strength obtained by combined spin pumping and inverse spin-Hall effect measurements is compared to microwave transmission experiments. Furthermore, microwave power-dependent measurements reveal a decrease in the coupling strength with increasing microwave power alongside the onset of nonlinearities of the superconducting resonator above a critical microwave power threshold.
@article{arxiv.2506.06996,
title = {Spin pumping driven by magnon-polaritons in a ferromagnet-coplanar superconducting resonator hybrid system},
author = {Dinesh Wagle and Yi Li and Anish Rai and Tomas Polakovic and Valentine Novosad and M. Benjamin Jungfleisch},
journal= {arXiv preprint arXiv:2506.06996},
year = {2025}
}