Anomalous far infrared monochromatic transmission through a film of type-II superconductor in magnetic field

TL;DR

This study reports on the discovery of anomalous far infrared monochromatic transmission through a type-II superconductor film, linked to localized photonic modes around vortices, with potential applications in infrared filtering.

Contribution

It introduces a novel observation of localized photonic modes in a superconductor lattice and models their frequency dependence on magnetic field and temperature.

Findings

Localized transmission frequency depends on magnetic field and temperature.

The phenomenon is modeled using a Dirac-type two-band approach.

Potential application in far infrared monochromatic filters.

Abstract

Anomalous far infrared monochromatic transmission through a lattice of Abrikosov vortices in a type-II superconducting film is found and reported. The transmitted frequency corresponds to the photonic mode localized by the defects of the Abrokosov lattice. These defects are formed by extra vortices placed out of the nodes of the ideal Abrokosov lattice. The extra vortices can be pinned by crystal lattice defects of a superconductor. The corresponding frequency is studied as a function of magnetic field and temperature in the framework of the Dirac-type two-band model. While our approach is valid for all type-II superconductors, the specific calculations have been performed for the YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ (YBCO). The control of the transmitted frequency by varying magnetic field and/or temperature is analyzed. It is suggested that found anomalously transmitted localized mode can be utilized in the far infrared monochromatic filters.