Active control of electromagnetically induced transparency analogue in all-dielectric metamaterials loaded with graphene

TL;DR

This paper demonstrates active control of electromagnetically induced transparency analogue in all-dielectric metamaterials loaded with graphene, achieving high modulation depth through tuning graphene's conductivity, enabling advanced light modulation and sensing applications.

Contribution

It introduces a novel hybrid all-dielectric metamaterial with graphene for tunable EIT resonance control, enhancing light-matter interaction at the nanoscale.

Findings

High modulation depth achieved in transmission amplitude.

Control of EIT resonance via graphene Fermi level and layer number.

Potential applications in light modulation, switching, and biosensing.

Abstract

Electromagnetically induced transparency (EIT) analogue in all-dielectric metamaterials with a high quality factor provides an effective route to enhance light-matter interaction at the nanoscale. In particular, the active control applied to it enables great degree of freedom for spatial light modulation and thus promises functional device applications with high flexible tunability. Here we load graphene into all-dielectric metamaterials and realize the remarkably high modulation depth in the transmission amplitude of the EIT resonance with the manipulation of graphene conductivity, via shifting the Fermi level or altering the layer number. The physical origin lies in the controllable light absorption through the interband loss of graphene in the near infrared. This work reveals a strategically important interaction mechanism between graphene and EIT resonance in all-dielectric metamaterials, and open avenues in designing a family of hybrid metadevices that permit promising applications to light modulation, switching and ultrasensitive biosensing.