Wide-band tuneability, nonlinear transmission, and dynamic multistability in SQUID metamaterials

G. P. Tsironis, N. Lazarides, I. Margaris

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations

    Abstract

    Superconducting metamaterials comprising rf Superconducting QUantum Interference Devices (SQUIDs) have been recently realized and investigated with respect to their tuneability, permeability, and dynamic multistability properties. These properties are a consequence of intrinsic nonlinearities due to the sensitivity of the superconducting state to external stimuli. SQUIDs, made of a superconducting ring interrupted by a Josephson junction, possess yet another source of nonlinearity, which makes them widely tuneable with an applied dc dlux. A model SQUID metamaterial, based on electric equivalent circuits, is used in the weak coupling approximation to demonstrate the dc flux tuneability, dynamic multistability, and nonlinear transmission in SQUID metamaterials comprising non-hysteretic SQUIDs. The model equations reproduce the experimentally observed tuneability patterns and predict tuneability with the power of an applied ac magnetic field. Moreover, the results indicate the opening of nonlinear frequency bands for energy transmission through SQUID metamaterials, for sufficiently strong ac fields.

    Original languageBritish English
    Pages (from-to)579-588
    Number of pages10
    JournalApplied Physics A: Materials Science and Processing
    Volume117
    Issue number2
    DOIs
    StatePublished - 9 Oct 2014

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