Innovative multilayered screens made of laminated graphene sheets, with SiO2 as interlayer, over a glass substrate are proposed as electrically-tunable electromagnetic shields at terahertz. The shielding effectiveness (SE) modeling is developed applying the transmission line method in a reverberating environment (i.e., with the screen surface illuminated by an infinite set of plane waves impinging with all possible propagation directions), which is of particular relevance in electromagnetic compatibility (EMC) studies. A new equivalent single layer (ESL) model of the graphene/SiO2 laminate (GL) is also proposed in order to provide a simple computationally-efficient method for the EMC design of GL shielding configuration via numerical EM tools. The approximate model is validated by comparison with the results obtained applying the exact one. The sensitivity analysis of the SE in reverberating environment is performed in the frequency range up to several tens of terahertz with respect to: the electric field bias of the graphene sheets, affecting their chemical potential level through an electrostatic carrier doping; the relaxation time characterizing the electron transport in graphene; the thickness of the SiO2 interlayers. Finally, the SE computed for different shielding configurations against a plane wave with normal or oblique incidence is compared with the one obtained in a reverberating environment in order to highlight the most significant differences at terahertz frequencies.

Terahertz Shielding Effectiveness of Graphene-Based Multilayer Screens Controlled by Electric Field Bias in a Reverberating Environment / D'Aloia, ALESSANDRO GIUSEPPE; D'Amore, Marcello; Sarto, Maria Sabrina. - In: IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY. - ISSN 2156-342X. - STAMPA. - 6:4(2015), pp. 628-636. [10.1109/TTHZ.2015.2440100]

Terahertz Shielding Effectiveness of Graphene-Based Multilayer Screens Controlled by Electric Field Bias in a Reverberating Environment

D'ALOIA, ALESSANDRO GIUSEPPE;D'AMORE, Marcello;SARTO, Maria Sabrina
2015

Abstract

Innovative multilayered screens made of laminated graphene sheets, with SiO2 as interlayer, over a glass substrate are proposed as electrically-tunable electromagnetic shields at terahertz. The shielding effectiveness (SE) modeling is developed applying the transmission line method in a reverberating environment (i.e., with the screen surface illuminated by an infinite set of plane waves impinging with all possible propagation directions), which is of particular relevance in electromagnetic compatibility (EMC) studies. A new equivalent single layer (ESL) model of the graphene/SiO2 laminate (GL) is also proposed in order to provide a simple computationally-efficient method for the EMC design of GL shielding configuration via numerical EM tools. The approximate model is validated by comparison with the results obtained applying the exact one. The sensitivity analysis of the SE in reverberating environment is performed in the frequency range up to several tens of terahertz with respect to: the electric field bias of the graphene sheets, affecting their chemical potential level through an electrostatic carrier doping; the relaxation time characterizing the electron transport in graphene; the thickness of the SiO2 interlayers. Finally, the SE computed for different shielding configurations against a plane wave with normal or oblique incidence is compared with the one obtained in a reverberating environment in order to highlight the most significant differences at terahertz frequencies.
2015
carrier relaxation time; chemical potential; doping;electromagnetic compatibility; electromagnetic shielding; graphene;laminates; multilayers; sensitivity analysis; sheet materials; silicon compounds; terahertz waves; transmission line theory
01 Pubblicazione su rivista::01a Articolo in rivista
Terahertz Shielding Effectiveness of Graphene-Based Multilayer Screens Controlled by Electric Field Bias in a Reverberating Environment / D'Aloia, ALESSANDRO GIUSEPPE; D'Amore, Marcello; Sarto, Maria Sabrina. - In: IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY. - ISSN 2156-342X. - STAMPA. - 6:4(2015), pp. 628-636. [10.1109/TTHZ.2015.2440100]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/825327
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