A metasurface with bidirectional hyperbolic surface modes and positionsensing applications

TL;DR

This paper presents a theoretical and experimental study of hyperbolic metasurfaces with bidirectional surface modes, demonstrating their potential for position sensing through hyperbolic iso-frequency contours and self-collimation frequencies.

Contribution

It introduces a novel hyperbolic metasurface with bidirectional surface modes and experimentally demonstrates its application in position sensing.

Findings

Successfully created hyperbolic iso-frequency contours along two orthogonal directions.

Identified two independent self-collimation frequencies for position sensing.

Demonstrated the metasurface's capability as a position sensor.

Abstract

We theoretically and experimentally studied resonance-induced hyperbolic metasurfaces, proving that it is an efficient way to introduce Fano-resonance and decreasethe Q-factor in our system in order to create hyperbolic iso-frequency contours (IFCs) along two orthogonal directions. The metasurface with a continuous topological transition for such IFCs has been designed and experimentally implemented. In particular, two independent selfcollimation frequencies corresponding to the transition frequencies in orthogonal directions. As a consequence, we experimentally demonstrated that the metasurface can function as a position- sensor by utilizing the bidirectional hyperbolic surface waves, opening a new avenue for position-sensing.