Terahertz superconducting plasmonic hole array

TL;DR

This paper presents a thermally tunable superconducting hole array on YBCO that controls terahertz surface plasmon resonances, enabling low-loss, dynamically adjustable terahertz devices.

Contribution

It introduces a novel, thermally tunable superconducting plasmonic hole array fabricated on YBCO, demonstrating active control over surface plasmon polaritons in the terahertz range.

Findings

Transition from virtual to real surface plasmon modes observed.

Array exhibits significant thermal tunability of resonant transmission.

Potential for low-loss, high-dynamic-range terahertz modulation.

Abstract

We demonstrate thermally tunable superconductor hole array with active control over their resonant transmission induced by surface plasmon polaritons . The array was lithographically fabricated on high temperature YBCO superconductor and characterized by terahertz-time domain spectroscopy. We observe a clear transition from the virtual excitation of the surface plasmon mode to the real surface plasmon mode. The highly tunable superconducting plasmonic hole arrays may have promising applications in the design of low-loss, large dynamic range amplitude modulation, and surface plasmon based terahertz devices.