1301.0440 (Philipp Jung et al.)

Low-loss tunable metamaterials using superconducting circuits with
Josephson junctions    [PDF]

Philipp Jung, Susanne Butz, Sergey V. Shitov, Alexey V. Ustinov

We report on experiments with superconducting metamaterials containing Josephson junctions. In these structures, split-ring resonators used in conventional metamaterials are replaced by superconducting loops that are interrupted by Josephson junctions, so called rf-SQUIDs. Like the split-ring resonators, these elements can be seen as LC-resonators that couple to the magnetic field. The advantage of superconducting thin-film metamaterials is that, due to the tunable intrinsic inductance of the Josephson junction, the resonance frequency of the rf-SQUID can be changed by applying an external dc magnetic field. We present experimental results that demonstrate the tunability of the resonance frequency of these devices.

View original: http://arxiv.org/abs/1301.0440