Photonic band-structure and optical S-matrix analyses of the proposed superconducting nanostructures

TL;DR

This paper investigates superconducting nanostructures' photonic band-structure and optical properties, demonstrating controllable terahertz band gaps and reflectance, with potential applications in THz photonics.

Contribution

It introduces novel superconducting nanostructures and analyzes their photonic band structure and optical S-matrix, highlighting tunable THz photonic band gaps based on geometry and temperature.

Findings

Structures exhibit tunable terahertz photonic band gaps.

Optical reflectance and transmittance are controllable in the THz range.

Negative refractive index observed in specific frequency range.

Abstract

Special optical structures composed of superconducting nanostructure based on the elemental type-II and layered high-Tc superconductors are proposed. The photonic band structure and the optical S-matrix are calculated for these proposed structures for different geometrical values. Such structures produce terahertz (THz) photonic band gap, which is controlled by the temperature and geometrical parameters. In addition, the proposed structures show controllable optical reflectance and transmittance in the considered terahertz range. The calculations are performed in a special frequency range in which the refractive index of the layered superconductors has negative value according to the previous analyses.