Realization and Modeling of Metamaterials Made of rf Superconducting Quantum-Interference Devices

M. Trepanier; Daimeng Zhang; Oleg Mukhanov; Steven M. Anlage

doi:10.1103/PhysRevX.3.041029

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Realization and Modeling of Metamaterials Made of rf Superconducting Quantum-Interference Devices

M. Trepanier, Daimeng Zhang, Oleg Mukhanov, Steven M. Anlage

DOI 10.1103/PhysRevX.3.041029 · Physical Review X

T1

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Abstract

We have prepared meta-atoms based on radio-frequency superconducting quantum-interference devices (rf SQUIDs) and examined their tunability with dc magnetic field, rf current, and temperature. rf SQUIDs are superconducting split-ring resonators in which the usual capacitance is supplemented with a Josephson junction, which introduces strong nonlinearity in the rf properties. We find excellent agreement between the data and a model that regards the Josephson junction as the resistively and capacitively shunted junction. A magnetic field tunability of 80 THz/G at 12 GHz is observed, a total tunability of 56% is achieved, and a unique electromagnetically induced transparency feature at intermediate excitation powers is demonstrated for the first time. An rf SQUID metamaterial is shown to have qualitatively the same behavior as a single rf SQUID with regard to dc flux and temperature tuning.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown