Tunable graphene-based hyperbolic metamaterial operating in SCLU telecom bands.

Area of Science:

• Condensed matter physics
• Materials science
• Nanophotonics

Background:

• Graphene-based hyperbolic metamaterials (HMMs) offer unique electromagnetic properties.
• Tunability is crucial for advanced optical communication devices.
• Operating regimes like Type I, Epsilon-Near-Zero (ENZ), and Type II HMMs are of significant interest.

Purpose of the Study:

• To investigate the tunability of graphene-based HMMs in SCLU telecom bands.
• To demonstrate the possibility of achieving Type I, ENZ, and Type II regimes through electrical biasing.
• To analyze the impact of structural parameters on HMM characteristics.

Main Methods:

• Numerical simulations of graphene/dielectric multilayer stacks.
• Analysis of dispersion characteristics under varying biasing potentials.
• Investigation of the influence of dielectric layer thickness and the number of graphene sheets.

Main Results:

• Achieved Type I, ENZ, and Type II HMM regimes by tuning the electrical biasing potential.
• Demonstrated tunability of dispersion characteristics in SCLU telecom bands.
• Identified the effect of structural parameters on the HMM operating regime and tunability range.

Conclusions:

• Graphene/dielectric multilayer structures can be designed to exhibit tunable HMM regimes (Type I, ENZ, Type II).
• Electrical biasing provides an effective method for controlling the HMM properties.
• These tunable metamaterials present a promising technological platform for optical communication applications.