Single Superconducting Split-Ring Resonator Electrodynamics

Details Single Superconducting Split-Ring Resonator Electrodynamics Single Superconducting Split-Ring Resonator Electrodynamics

2005-12-20

arxiv.org/abs/cond-mat/0512515v2

Appl. Phys. Lett. 88, 264102 (2006) (3 pages)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures, RevTex, submitted to Applied Physics Letters. Updated version includes mention of bianisotropy, better loo

Scientific paper

10.1063/1.2216931

We investigate the microwave electrodynamic properties of a single superconducting thin film split-ring resonator (SRR). The experiments were performed in an all-Nb waveguide, with Nb wires and Nb SRRs. Transmission data showed a high-Q stopband for a single Nb SRR ($Q \sim 4.5\times10^4$ at 4.2 K) below $T_c$, and no such feature for a Cu SRR, or closed Nb loops, of similar dimensions. Adding SRRs increased the bandwidth, but decreased the insertion loss of the features. Placing the Nb SRR into an array of wires produced a single, elementary negative-index passband ($Q \sim 2.26\times10^4$ at 4.2 K). Changes in the features due to the superconducting kinetic inductance were observed. Models for the SRR permeability, and the wire dielectric response, were used to fit the data.

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