Tunable graphene reflective cells for THz reflectarrays and generalized law of reflection

By Eduardo Carrasco, M. Tamagnone, Julien Perruisseau-Carrier. 2012

183 citations recorded by the source corpus.

A tunable graphene-based reflective cell operating at THz is proposed for use in reconfigurable-beam reflectarrays, or similarly to implement the so-called generalized law of reflection. The change in the complex conductivity of graphene when biased by an electric field allows controlling the phase of the reflected field at each element of the array. Additionally, the slow wave propagation supported by graphene drastically reduces the dimensions of the cell, which allows smaller inter-element spacing hence better array performance. An elementary cell is optimized and its scattering parameters computed, demonstrating a dynamic phase range of 300° and good loss figure for realistic chemical potential variations. Finally, a circuit model is proposed and shown to very accurately predict the element response.

Subfields: Aerospace Engineering, Biomedical Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/44fd144ffd632cbe2bcc1471e175d79a5cbe7a26

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In Aerospace Engineering

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In Electronic, Optical and Magnetic Materials

Citations in the corpus

A Vision and Framework for the High Altitude Platform Station (HAPS) Networks of the Future (2020, background): “, Gigahertz (GHz) and Terahertz (THz) bands, tunable materials such as liquid crystal [106] and graphene [107], [108] are used.”
Reconfigurable Reflectarrays and Array Lenses for Dynamic Antenna Beam Control: A Review (2013, background): “It has been proposed to address upper terahertz or even infrared frequencies using graphene [35][47].”
Dynamic control of electromagnetic wave propagation with the equivalent principle inspired tunable metasurface (2014, background): “By inverting equations (3) and (4), we get”
Graphene-Based Plasmonic Tunable Low-Pass Filters in the Terahertz Band (2013, background): “Currently, graphene-based plasmonic components ranging from waveguides [7]–[10], antennas [11]–[14], reflectarrays [15], amplifiers [16], switches [17], modulators [18], or phaseshifters [19] to sensors [20], [21] have already been proposed and investigated.”
Sinusoidally Modulated Graphene Leaky-Wave Antenna for Electronic Beamscanning at THz (2013, background): “have further studied the capabilities of graphene in antenna design [7], [8] and even the integration of graphene in beam steering reflect arrays [9].”