Multi-Band Analogue Electromagnetically Induced Transparency in DoubleTuned Metamaterials

Area of Science:

• Metamaterials
• Optoelectronics
• Condensed Matter Physics

Background:

• Electromagnetically induced transparency (EIT) is a quantum interference effect.
• Metamaterials offer unique electromagnetic properties not found in natural materials.
• Controlling light-matter interactions at the nanoscale is crucial for advanced optical devices.

Purpose of the Study:

• To propose and investigate a novel multi-band analogue electromagnetically induced transparency (A-EIT) metamaterial.
• To explore the tunability of the A-EIT effect using liquid crystal and graphene.
• To assess the angular stability of the proposed metamaterial.

Main Methods:

• Fabrication of a metamaterial structure comprising liquid crystal and graphene strips on silicon dioxide.
• Numerical simulation of transmission spectra and electric field distributions.
• Analysis of the A-EIT effect through coupled bright modes and electric dipole resonances.

Main Results:

• Achieved multi-band A-EIT through the coupling of multiple graphene strips.
• Demonstrated voltage-tunable A-EIT by adjusting liquid crystal and graphene properties.
• Observed minimal influence of incident angle on the low-frequency transmission window, indicating angular insensitivity.
• Each transmission window exhibited high maximum transmittance and figure of merit (FOM).

Conclusions:

• The proposed metamaterial effectively exhibits multi-band A-EIT.
• The A-EIT effect is tunable via external voltage, enhancing its practical applicability.
• The metamaterial's robustness to incident angles and high performance metrics suggest significant potential for sensor and optical storage devices.