Superior microwave shielding modulation based on rapidly prepared graphene metasurface

Area of Science:

• Materials Science
• Electromagnetics
• Nanotechnology

Background:

• Active manipulation of electromagnetic wave jamming is vital for advanced electronics.
• Existing tunable materials face limitations in modulation range and thickness.

Purpose of the Study:

• To develop a micrometer-thick graphene metasurface for tunable microwave shielding.
• To achieve continuous modulation between wave transmission and shielding.

Main Methods:

• Fabrication of a micrometer-thick graphene metasurface with periodically arranged graphene strips.
• Utilizing laser-induced ultrafast kinetics for facile preparation and open-air processability.
• Investigating wave-induced electron oscillation anisotropy for shielding modulation.

Main Results:

• Achieved continuous modulation of shielding efficiency from 9.66% to 99.78%.
• Demonstrated enhanced shielding by aligning the metasurface with the incident electric field.
• Showcased facile preparation and open-air processability of the graphene metasurface.

Conclusions:

• The graphene metasurface offers a promising solution for tunable microwave shielding in adaptive electronics.
• The material's properties facilitate applications in smart electromagnetic devices and data encryption.