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

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Date
2013-12-18
Authors
Trepanier, M.
Zhang, Daimeng
Mukhanov, Oleg
Anlage, Steven M.
Advisor
Citation
M. Trepanier, Daimeng Zhang, Oleg Mukhanov, and Steven M. Anlage. (2013). Realization and Modeling of Metamaterials Made of rf Superconducting Quantum-Interference Devices. Phys. Rev. X. doi:10.1103/PhysRevX.3.041029
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.
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Funding for Open Access provided by the UMD Libraries Open Access Publishing Fund.
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