Graphene-Based Metasurfaces

Dear Colleagues,

Graphene is a two-dimensional material made of carbon atoms arranged in a honeycomb lattice. Due to its unique band structure, graphene’s optical properties can be dynamically modified by external sources, which provide strong tunability for electromagnetic surfaces. Graphene has been examined and employed as a constituent element in a variety of metamaterials and metasurfaces configurations. In the design of metasurfaces, graphene has been patterned into specific structures or hybridized with metallic and dielectric metasurfaces, which realizes strong field localization. The high localization enhances the wave-matter interactions in graphene and leads to evident reconfigurability of the overall response via external sources. Common tunability mechanisms involve the modification of the doping level with an electrostatic field and the generation of hot carriers under optical pumping. Depending on the meta-atom architecture and the stimuli, one can achieve dynamic control of the intensity, phase and polarization of the impinging electromagnetic waves in a spectrum ranging from low terahertz to mid-infrared. This may lead to a variety of tunable electromagnetic functionalities such as perfect absorption, wave-front manipulation and modulation for flat lenses, hyperbolic responses, enhanced chirality, polarization control, electromagnetic non-reciprocity with time modulation, and enhanced non-linear response, placing graphene at the center of the research attention in metasurface technologies.

Dr. Anna Tasolamprou
Dr. George Kenanakis
Dr. Xuchen Wang
Guest Editors

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• Graphene
• Metasurfaces
• Tunabiltiy
• Exotic wave control
• Graphene plasmonics