2026-10-13 アルゴンヌ国立研究所（ANL）
Two layers of the device are shown separately to clarify the coupling between them. Spin waves in the thin film excite microwaves in the L-shaped superconducting circuit. The microwaves then travel to the rest of the device through the path indicated by the wavy arrows. (Image: Yi Li/Argonne National Laboratory)
＜関連情報＞
- https://www.anl.gov/article/from-spin-wave-to-superconducting-circuit-a-oneway-street-for-quantum-information
- https://journals.aps.org/prl/abstract/10.1103/8t91-w9nn
超伝導共振器における伝搬スピン波とマイクロ波光子の強い結合 Strong Coupling between Propagating Spin Waves and Microwave Photons in a Superconducting Resonator
Yi Li, Jinho Lim, Xingzhi Wang, Tomas Polakovic, Carissa Kiehl, Moojune Song, Phuoc Cao Van, Ralu Divan, Ulrich Welp et al.
Physical Review Letters Published: 10 September, 2026
DOI: https://doi.org/10.1103/8t91-w9nn
Abstract
We demonstrate strong coupling between propagating spin-wave modes and microwave photons in superconducting resonator-magnetic thin film hybrid circuits. By fabricating the resonator directly on yttrium iron garnet thin films grown on rare-earth-free Y3Sc2Ga3O12 substrates, we achieve strong coupling of both Damon-Eshbach and backward-volume spin-wave modes to the resonator, with coupling strengths exceeding both the magnon and photon damping rates. Furthermore, we observe nonreciprocal spin-wave radiation of the hybrid magnonic mode in the Damon-Eshbach configuration, highlighting the potential for incorporating intrinsic spin-wave nonreciprocity into hybrid magnonic systems. These results open new avenues for integrating spin-wave magnonics with cavity magnonics and for harnessing spin waves for potential applications in quantum information science.
