Dynamically tunable metamaterial analogue of electromagnetically induced transparency with graphene in the terahertz regime

TL;DR

This paper proposes a new method to achieve tunable electromagnetically induced transparency in the terahertz range using graphene, enabling dynamic control of light transmission for potential wireless communication applications.

Contribution

It introduces a graphene-based tunable EIT analogue in metamaterials, allowing electrical modulation of transparency in the terahertz regime.

Findings

Amplitude of EIT resonance can be significantly modulated by changing graphene's Fermi level.

The modulation is due to altered damping rate of the dark mode caused by graphene's recombination effect.

Potential for tunable slow light and applications in THz wireless communications.

Abstract

A novel mechanism to realize dynamically tunable electromagnetically induced transparency (EIT) analogue in the terahertz (THz) regime is proposed. By putting the electrically controllable monolayer graphene under the dark resonator, the amplitude of the EIT resonance in the metal-based metamaterial can be modulated substantially via altering the Fermi level of graphene. The amplitude modulation can be attributed to the change in the damping rate of the dark mode caused by the recombination effect of the conductive graphene. This work provides an alternative way to achieve tunable slow light effect and has potential applications in THz wireless communications.