Strong Coupling between Magnons and Microwave Photons in On-Chip Ferromagnet-Superconductor Thin-Film Devices 论文
2019Physical Review Letters引用 216
Mechanical and Optical ResonatorsAtomic and Subatomic Physics ResearchQuantum Information and Cryptography
详细信息
- 发表期刊/会议
- Physical Review Letters
- 发表日期
- 2019-09-03
- 发表年份
- 2019
关键词
Mechanical and Optical ResonatorsAtomic and Subatomic Physics ResearchQuantum Information and Cryptography
摘要
We demonstrate strong magnon-photon coupling of a thin-film Permalloy device fabricated on a coplanar superconducting resonator. A coupling strength of 0.152 GHz and a cooperativity of 68 are found for a 30-nm-thick Permalloy stripe. The coupling strength is tunable by rotating the biasing magnetic field or changing the volume of Permalloy. We also observe an enhancement of magnon-photon coupling in the nonlinear regime of the superconducting resonator, which is attributed to the nucleation of dynamic flux vortices. Our results demonstrate a critical step towards future integrated hybrid systems for quantum magnonics and on-chip coherent information transfer.