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

Autor:	Galin, M. A., Rudau, F., Borodianskyi, E. A., Kurin, V. V., Koelle, D., Kleiner, R., Krasnov, V. M., Klushin, A. M.
Rok vydání:	2020
Předmět:	Condensed Matter - Superconductivity Nonlinear Sciences - Adaptation and Self-Organizing Systems Physics - Optics
Zdroj:	Phys. Rev. Applied 14, 024051 (2020)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevApplied.14.024051
Popis:	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. Comment: 6 pages, 3 Figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2004.06623 Zobrazit plný text záznamu View this record from Arxiv