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Multispectral Graphene-Based Electro-Optical Surfaces with Reversible Tunability from Visible to Microwave
M Said Ergoktas1,2, Gokhan Bakan1,2, Evgeniya Kovalska3
1Department of Materials, University of Manchester, Manchester, M13 9PL, UK.
Nature Photonics
|July 5, 2021
Summary
Researchers developed graphene-based devices with tunable optical properties across the entire electromagnetic spectrum. This breakthrough enables new applications in displays, camouflage, and smart optical surfaces.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Optical materials with color-changing abilities are limited by wavelength dependence.
- Existing technologies restrict functionality to specific spectral ranges.
Purpose of the Study:
- To report novel graphene-based electro-optical devices with broad optical tunability.
- To demonstrate non-volatile and reversible color changes using electro-intercalation.
Main Methods:
- Fabrication of optically accessible graphene devices.
- Electro-intercalation of lithium ions into graphene layers.
- Demonstration of area-selective optical tuning.
Main Results:
- Achieved unprecedented optical tunability from visible to microwave frequencies.
- Demonstrated non-volatile and reversible color-changing capabilities.
- Showcased area-selective intercalation for multispectral device fabrication.
Conclusions:
- Graphene-based devices offer a realistic approach for programmable smart optical surfaces.
- Potential applications include advanced display devices, electro-optical camouflage, active plasmonics, and adaptive thermal management.
