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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Graphene-based extremely wide-angle tunable metamaterial absorber.
Jacob Linder1, Klaus Halterman2
1Department of Physics, NTNU, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Scientific Reports
|August 25, 2016
Summary
We developed a tunable graphene metamaterial for near-perfect light absorption across wide angles. This breakthrough offers dynamic control over energy transmission, paving the way for advanced optical devices.
Area of Science:
- Photonics and Materials Science
- Optoelectronics and Nanotechnology
Background:
- Metamaterials offer unique electromagnetic properties not found in natural materials.
- Graphene's tunable electronic properties make it a promising component for dynamic optical devices.
Purpose of the Study:
- To investigate the absorption properties of graphene-based anisotropic metamaterial structures.
- To explore the potential for tunable, near-perfect light absorption over a broad range of incidence angles.
Main Methods:
- Analytical and numerical studies were conducted.
- The electromagnetic response of metamaterial layers with near-zero permittivity was analyzed.
- The coupling between light and a fast wave-mode was investigated.
Main Results:
- Near-perfect absorption was achieved over an unusually broad range of beam incidence angles.
- Absorption was found to be tunable via a gate voltage due to the presence of graphene.
- Dynamic control of energy transmission was demonstrated.
Conclusions:
- Graphene-based anisotropic metamaterials exhibit tunable near-perfect absorption.
- The enhanced absorption is attributed to the coupling between light and a fast wave-mode.
- These findings open possibilities for advanced tunable optical devices and energy control applications.
