在漫游波的约瑟夫森装置中混合反传播信号
M Praquin1, A Giraudo1, V Lienhard1,2
1Laboratoire de Physique de l'Ecole Normale Supérieure, Mines Paris-PSL, Inria, ENS-PSL, Université PSL, CNRS, Sorbonne Université, Paris, France.
Nature communications
|December 12, 2025
概括
研究人员使用约瑟夫森元材料开发了一种新的微波隔离器. 该设备可实现频率转换,并可重新配置为可调节合,在超导电路中推进微波路由.
科学领域:
- 非线性光学和光子学
- 凝聚物质物理学 凝聚物质物理学
- 超材料科学 超材料科学
背景情况:
- 光波通常不会在真空中相互作用,因此需要非线性介质来进行频率转换.
- 能量和动量保护通常需要相似的相位速度来相互作用的波.
- 现有的频率转换方法在特定应用中存在局限性.
研究的目的:
- 调查微波频率转换的替代方案.
- 使用约瑟夫森元材料演示可重新配置的芯片上微波隔离器.
- 探索可调节微波路由和处理的潜力.
主要方法:
- 使用一个一维的约瑟夫森超材料.
- 使用较慢的波与微波信号相互作用.
- 分析波的频率转换和传播特征.
主要成果:
- 实现了微波信号的频率转换成反传播波.
- 证明了一个隔离器的隔离超过5dB (5-8.5GHz) 和10dB (7-8.5GHz).
- 观察到 200 MHz 的典型带宽和可重新配置的操作.
结论:
- 拟议方案允许在非线性元材料中高效地进行微波频率转换.
- 该设备作为可重新配置的隔离器和可调节的合器,用于微波路由.
- 未来的优化有望提高超导电路的性能.
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