Tunable vortex dynamics in proximity junction arrays: a possible accurate and sensitive 2D THz detector

TL;DR

This paper explores tunable vortex dynamics in superconducting proximity island arrays, demonstrating potential for highly sensitive 2D THz detection through electric and magnetic field modulation of vortex states.

Contribution

It introduces a novel superconducting array system capable of transitioning between vortex insulator and metal states, with implications for advanced radiation detection.

Findings

Transition from vortex Mott insulator to vortex metal with field tuning

Potential for non-bolometric, highly sensitive THz detection

Modulation of superconducting states via electric/magnetic fields

Abstract

An array of superconducting proximity islands has been shown to be highly tunable by electric and magnetic fields. Indeed, a small change in the electric and magnetic field can tune the system from a vortex Mott insulator to a vortex metal. This transition from localized to a non-localized state can occur as soon as the density of the superconducting vortices matches the density of the pinning sites in a non defective structure. The possibility of further modulation of non-localized superconducting states via enhancement of the superconducting order parameter or modulation of the Josephson plasma frequency is discussed. Based on the non-bolometric effects associated with the occurrence of non-equilibrium phenomena in this original superconducting networks we discuss also the possible applications of this array for a conceptually new type of radiation detector.