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Related Experiment Video

Updated: Apr 16, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Gate-controlled mid-infrared light bending with aperiodic graphene nanoribbons array.

Eduardo Carrasco¹, Michele Tamagnone, Juan R Mosig

¹Adaptive MicroNano Wave Systems, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

|March 12, 2015

Summary

Graphene nanostructures can steer mid-infrared light beams by controlling reflection angles. This research demonstrates electrical control over light reflection using engineered graphene nanoribbons for precise beam direction.

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Last Updated: Apr 16, 2026

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Graphene-Assisted Quasi-van der Waals Epitaxy of AlN Film on Nano-Patterned Sapphire Substrate for Ultraviolet Light Emitting Diodes

Published on: June 25, 2020

Area of Science:

Plasmonics
Nanophotonics
Electromagnetics

Background:

Graphene plasmonic nanostructures offer subwavelength confinement of electromagnetic energy.
Light scattering phase near resonance dictates reflection angle control.

Purpose of the Study:

To demonstrate electrical control over the reflection angle of mid-infrared light.
To engineer aperiodic graphene nanoribbons for tunable light steering.

Main Methods:

Full-wave electromagnetic simulations based on Maxwell equations.
Design of an aperiodic array of graphene nanoribbons with engineered widths.

Main Results:

Achieved spatially varying reflection phase profiles.
Demonstrated the construction of a far-field collimated beam in a predefined direction.
Electrical control of the reflection angle was successfully simulated.

Conclusions:

Aperiodic graphene nanoribbon arrays can electrically control light reflection angles.
This technology enables tunable beam steering for mid-infrared applications.
Graphene plasmonics provides a pathway for advanced optical control devices.