Metamaterial atom with multijunction superconducting structure

TL;DR

This paper demonstrates through simulations that a metamaterial element combining superconducting Josephson junctions and normal metal resonators can be tuned via magnetic fields, enabling negative media properties.

Contribution

It introduces a novel metamaterial atom design with multijunction superconducting structures for tunable negative media applications.

Findings

Superconducting resonator with Josephson junctions can be magnetically tuned.

The proposed design exhibits negative media characteristics in simulations.

Superconducting elements outperform passive metal resonators in tunability.

Abstract

We present results of numerical simulations of a metamaterial element (meta-atom) for planar negative media based on cuprate Josephson junctions. The proposed circuit consists of two coupled resonators: "magnetic dipole" and "electric dipole". The first one is a superconducting spiral resonator with multijunction superconducting structure - SQIF (SQIF - superconducting quantum interference filter), and the second one is a comb-shape resonator made from normal metal film. We show, that in comparison with passive metal resonators, the superconducting resonator with Josephson junctions (magnetic dipole) can be tuned by external magnetic field due to magnetic dependence of Josephson inductance. The simulated characteristics of one-dimensional planar negative media are discussed.