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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

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A 3D tunable and multi-frequency graphene plasmonic cloak.

Mohamed Farhat¹, Carsten Rockstuhl, Hakan Bağcı

¹Division of Computer, Electrical, and Mathematical Sciences and Engineering 4700 King Abdullah University of Science and Technology Thuwal 23955-6900, Saudi Arabia. mohamed.farhat@kaust.edu.sa

|June 6, 2013

Summary

Researchers developed a multi-frequency cloak for 3D objects using tunable graphene layers in the far-infrared spectrum. This technology enables advanced plasmonic applications and disruptive photonic technologies.

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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Area of Science:

Optics and Photonics
Materials Science
Condensed Matter Physics

Background:

Metamaterials enable novel electromagnetic wave manipulation.
Graphene's tunable electronic properties offer potential for advanced optical devices.
Far-infrared cloaking remains a significant challenge in electromagnetic research.

Purpose of the Study:

To demonstrate multi-frequency cloaking of 3D objects in the far-infrared spectrum.
To investigate the use of tunable graphene layers for cloaking applications.
To explore the potential of graphene-based plasmonics in photonic technologies.

Main Methods:

Utilizing graphene layers doped via variable external voltage for frequency tuning.
Simulating cloaking performance for a dielectric sphere with single and multiple graphene layers.
Employing near- and far-field computational methods to verify cloak functionality.

Main Results:

Successfully demonstrated cloaking of 3D objects at multiple frequencies in the far-infrared range.
Showcased independent tuning of cloaking frequencies by adjusting gate voltages on multiple graphene layers.
Verified the suppression of scattering from a dielectric sphere using a single graphene layer.

Conclusions:

Graphene layers offer a viable method for achieving tunable, multi-frequency cloaking.
The proposed mechanism contributes to the development of practical graphene-based plasmonic devices.
This research paves the way for disruptive photonic technologies utilizing advanced cloaking capabilities.