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Related Experiment Video

Updated: Oct 12, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

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Published on: September 25, 2020

Graphene-based terahertz metamirror with wavefront reconfiguration.

Jiashuai Xu, Wenwen Liu, Zhengyong Song

|November 23, 2021

Summary

This study presents a graphene-based reflective metasurface for dynamic terahertz wave control. The device enables reconfigurable wavefronts for applications in switching, communication, and focusing.

Area of Science:

Metasurfaces
Terahertz (THz) technology
Graphene applications

Background:

Graphene is an emerging material with broad applications in active metasurfaces.
Dynamical control of electromagnetic wavefronts is a key research area.

Purpose of the Study:

To present a graphene-based reflective metasurface for dynamical wavefront reconfiguration of terahertz waves.
To demonstrate multiple functionalities including gradient reflection, vortex beam generation, and tunable focusing.

Main Methods:

Designed a hybrid structure using cross-shaped graphene and a metal patch for 360° phase modulation.
Utilized the Fermi level of graphene to tune the metasurface properties.
Demonstrated wavefront reconstruction through three examples: gradient metasurface, vortex beam generator, and focusing mirror.

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Published on: September 25, 2020

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Published on: August 30, 2012

Main Results:

Achieved dynamical control of terahertz wavefronts.
Demonstrated switching between positive and negative reflections using the gradient metasurface.
Reconstructed the orbital angular momentum mode number for vortex beam generation.
Verified a reflective lens with tunable focusing (appearance/disappearance).

Conclusions:

The proposed graphene-based reflective metasurface offers versatile wavefront control for terahertz waves.
Potential applications include terahertz switching, communication, and advanced focusing systems.