Coherent oscillations of driven rf SQUID metamaterials.

Melissa Trepanier, Daimeng Zhang, Oleg Mukhanov, V P Koshelets, Philipp Jung, Susanne Butz, Edward Ott, Thomas M Antonsen, Alexey V Ustinov, Steven M Anlage

Physical review. E 2017 May

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Through experiments and numerical simulations we explore the behavior of rf SQUID (radio frequency superconducting quantum interference device) metamaterials, which show extreme tunability and nonlinearity. The emergent electromagnetic properties of this metamaterial are sensitive to the degree of coherent response of the driven interacting SQUIDs. Coherence suffers in the presence of disorder, which is experimentally found to be mainly due to a dc flux gradient. We demonstrate methods to recover the coherence, specifically by varying the coupling between the SQUID meta-atoms and increasing the temperature or the amplitude of the applied rf flux.

Citation

Melissa Trepanier, Daimeng Zhang, Oleg Mukhanov, V P Koshelets, Philipp Jung, Susanne Butz, Edward Ott, Thomas M Antonsen, Alexey V Ustinov, Steven M Anlage. Coherent oscillations of driven rf SQUID metamaterials. Physical review. E. 2017 May;95(5-1):050201

PMID: 28618480

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