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Strong on-Chip Microwave Photon-Magnon Coupling Using Ultralow-Damping Epitaxial Y3Fe5O12 Films at 2 K. 2023
Side Guo, and
Daniel Russell, and
Joseph Lanier, and
Haotian Da, and
P Chris Hammel, and
Fengyuan Yang
Department of Physics, The Ohio State University, Columbus, Ohio 43210, United States of America.
Y3Fe5O12 is arguably the best magnetic material for magnonic quantum information science (QIS) because of its extremely low damping. We report ultralow damping at 2 K in epitaxial Y3Fe5O12 thin films grown on a diamagnetic Y3Sc2Ga3O12 substrate that contains no rare-earth elements. Using these ultralow damping YIG films, we demonstrate for the first time strong coupling between magnons in patterned YIG thin films and microwave photons in a superconducting Nb resonator. This result paves the road toward scalable hybrid quantum systems that integrate superconducting microwave resonators, YIG film magnon conduits, and superconducting qubits into on-chip QIS devices.
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