Plasmonic Scaling of Superconducting Metamaterials

Abstract

Superconducting metamaterials are utilized to study the approach to the plasmonic limit simply by tuning temperature to modify the superfluid density, and thus the superfluid plasma frequency. We examine the persistence of artificial magnetism in a metamaterial made with superconductors in the plasmonic limit, and compare to the electromagnetic behavior of normal metals as a function of frequency as the plasma frequency is approached from below. Spiral-shaped Nb thin film meta-atoms of scaled dimensions are employed to explore the plasmonic behavior in these superconducting metamaterials, and the scaling condition allows extraction of the temperature dependent superfluid density, which is found to be in good agreement with expectations.

5 pages, 3 figures

References in corpus (6)

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Cited by in corpus (6)

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• Searching For Dark Matter with Plasma Haloscopes
• Tunable negative permeability in a three-dimensional superconducting metamaterial
• Tunable Superconducting Josephson Dielectric Metamaterial
• Light-matter interactions in chip-integrated niobium nano-circuit arrays at optical fibre communication frequencies