论文标题
通过表面电磁波直接可视化大约瑟夫森连接阵列的相锁定
Direct visualization of phase-locking of large Josephson junction arrays by surface electromagnetic waves
论文作者
论文摘要
振荡器的相锁定导致排放能力的超级放大。这对于遭受低排放功效的THZ来源的发展尤其重要。在这项工作中，我们研究了包含数千个基于NB的连接的大约约瑟夫森连接阵列。使用低温扫描激光显微镜，我们观察到在某些偏差条件下，形成了二维站立波模式，表现出阵列的全局同步。对立波的分析表明它们是由在电极/底物界面传播的表面等离子体类型的电磁波形成的。因此，我们证明表面波为大连接阵列的远程耦合和相锁定提供了有效的机制。
Phase-locking of oscillators leads to superradiant amplification of the emission power. This is particularly important for development of THz sources, which suffer from low emission efficacy. In this work we study large Josephson junction arrays containing several thousands of Nb-based junctions. Using low-temperature scanning laser microscopy we observe that at certain bias conditions two-dimensional standing-wave patterns are formed, manifesting global synchronization of the arrays. Analysis of standing waves indicates that they are formed by surface plasmon type electromagnetic waves propagating at the electrode/substrate interface. Thus we demonstrate that surface waves provide an effective mechanism for long-range coupling and phase-locking of large junction arrays.
