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arXiv 2004.06623cond-mat.supr-connlin.AOphysics.optics
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用表面电磁波直接观测大约瑟夫森结阵列的锁相

Direct visualization of phase-locking of large Josephson junction arrays by surface electromagnetic waves

M. A. Galin, F. Rudau, E. A. Borodianskyi, V. V. Kurin, D. Koelle, R. Kleiner, V. M. Krasnov, A. M. Klushin

摘要:

振荡器的锁相导致发射功率的超辐射放大。这对于太赫兹源的发展特别重要,太赫兹源具有低发射效率。在这项工作中,我们研究了大型约瑟夫森结阵列包含数千Nb基结。使用低温扫描激光显微镜,我们观察到,在一定的偏压条件下,二维驻波图案的形成,体现了全球同步的阵列。驻波的分析表明,它们是由表面等离子体类型的电磁波在电极/衬底界面处传播形成的。因此,我们证明,表面波提供了一个有效的机制,为远程耦合和大结阵列的相位锁定。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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