AI 中文总结
该研究利用超导控制元件的磁屏蔽效应调控自旋波色散，实现温度可调的自旋波折射，为微波控制提供了新的方案。
AI 中文摘要
自旋波是微米级微波控制领域极具潜力的信号载体，但实现低损耗、可调的自旋波传播控制仍是核心挑战。本研究利用超导控制元件产生的磁屏蔽效应调控局域自旋波色散，在薄膜磁绝缘体中实现了温度可控的自旋波折射。基于金刚石自旋的磁成像技术，我们表征了该结构的折射率，成功观测到正折射、负折射以及超导体实现的波前整形。通过对超导体诱导的双曲自旋波色散修正进行几何分析，可解释观测到的折射现象。本研究证明超导体可用于制备可调自旋波光学元件，为经典或量子信息器件中的微波控制开辟了新机遇。
英文摘要
Spin waves are promising signal carriers for microwave control at the micrometer scale. However, realizing low-damping, tunable control of spin-wave propagation remains a central challenge. Here we use magnetic shielding by superconducting control elements to tune the local spin-wave dispersion and realize temperature-controlled refraction of spin waves in a thin-film magnetic insulator. Using magnetic imaging based on spins in diamond, we characterize the refractive index and demonstrate both positive and negative refraction as well as wavefront shaping by the superconductors. The observed refraction is explained by a geometrical analysis of the superconductivity-induced modification of the hyperbolic spin-wave dispersion. Our results demonstrate that superconductors enable tunable spin-wave optical elements, opening new opportunities for microwave control in classical or quantum information devices.
Comments29 pages, 26 figures, 1 table
