Josephson Metamaterial with a Widely Tunable Positive or Negative Kerr Constant

Wenyuan Zhang, W. Huang, M. E. Gershenson, M. T. Bell

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


We report on the microwave characterization of a novel one-dimensional Josephson metamaterial composed of a chain of asymmetric superconducting quantum interference devices with nearest-neighbor coupling through common Josephson junctions. This metamaterial demonstrates a strong Kerr nonlinearity, with a Kerr constant tunable over a wide range, from positive to negative values, by a magnetic flux threading the superconducting quantum interference devices. The experimental results are in good agreement with the theory of nonlinear effects in Josephson chains. The metamaterial is very promising as an active medium for Josephson traveling-wave parametric amplifiers; its use facilitates phase matching in a four-wave-mixing process for efficient parametric gain.

Original languageEnglish (US)
Article number051001
JournalPhysical Review Applied
Issue number5
StatePublished - Nov 13 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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