Graphene Hypersurface for Manipulation of THz Waves

Abstract:

In this work, we investigated graphene hypersurface (HSF) for the manipulation of THz waves. The graphene HSF structure is consists of a periodic array of graphene unit cells deposited on silicon substrate and terminated by a metallic ground plane. The performance of the proposed HSF is numerically analyzed. Electromagnetic parameters of HSF such as permeability, permittivity, and impedance are studied. The proposed graphene HSF has active control over absorption, reflection, and transmission of THz waves. The graphene HSF provides perfect absorption, zero reflection and zero transmission at resonance. Moreover, the graphene HSF structure has the advantage of anomalous reflection and frequency reconfiguration. Incident waves can be reflected in the desired direction, depending on the phase gradient of the HSF and the perfect absorption is maintained at all reconfigurable frequencies upon reconfiguration. The results reveal the effectiveness of the graphene HSF for the manipulation of THz waves.

• Periodical: Materials Science Forum (Volume 1009)
• Pages: 63-68
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1009.63
• Online since: August 2020
• Authors: Sasmita Dash*, Christos Liaskos, Ian F. Akyildiz, Andreas Pitsillides
• Keywords: Absorption, Anomalous Reflection, Graphene, Metasurface, Reconfiguration, THz Wave

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