Anisotropic 2D materials for tunable hyperbolic plasmonics

TL;DR

This paper explores anisotropic 2D materials that support highly directional hyperbolic plasmons, which can be dynamically controlled via gate doping, enabling advanced manipulation of plasmonic beams for future nanophotonic applications.

Contribution

It demonstrates that a broad class of anisotropic 2D materials can host tunable hyperbolic plasmons with controllable propagation directions, a capability not available in 3D hyperbolic media.

Findings

Anisotropic 2D materials support directional hyperbolic plasmons.

Gate doping enables on-the-spot control of plasmon propagation.

Potential for dynamic beam reflection, refraction, and bending.

Abstract

Motivated by the recent emergence of a new class of anisotropic 2D materials, we examine their electromagnetic modes and demonstrate that a broad class of the materials can host highly directional hyperbolic plasmons. Their propagation direction can be manipulated on-the-spot by gate doping, enabling hyperbolic beams reflection, refraction and bending. The realization of these natural 2D hyperbolic media opens up a new avenue in dynamic control of hyperbolic plasmons not possible in the 3D version.