Robust Q-tunable topological induced transparency in metasurface

TL;DR

This paper introduces a robust, polarization-controlled, tunable high-Q plasmon-induced transparency in metasurfaces, with theoretical analysis and experimental validation demonstrating resilience to fabrication imperfections.

Contribution

It presents the first demonstration of a robust, polarization-sensitive, tunable high-Q PIT in metasurfaces that withstands geometrical imperfections, advancing nanophotonics device design.

Findings

The metasurface achieves high-Q PIT that is polarization-controlled.

The resonance remains stable despite fabrication imperfections.

Experimental results confirm theoretical predictions.

Abstract

In this study, we demonstrate first, to the best of our knowledge, robust and dynamically polarization-controlled tunable-high-Q PIT in designed nanostructures metasurface, whose sharp resonance is guaranteed by design and protected against large geometrical imperfections. By employing the explicit analysis of near-field characteristic in the reciprocal-space based on the momentum matching, and the far-field radiation features with point-scattering approach in real-space sparked from Huygens's principles, the physics of interference resonance in the spectra for plane-wave optical transmission and reflection of the metasurface is theoretically and thoroughly investigated. The experimental results verify the theory prediction. The distinctive polarization-selective and Q-tunable PIT shows robust features to performance degradations in traditional PIT system caused by inadvertent fabrication flaws or geometry asymmetry-variations, which paves way for the development of reconfigurable and flexible metasurface and, additionally, opens new avenues in robust and multifunctional nanophotonics device design and applications.