In this paper, the authors report an experimental demonstration of microwave reflection tuning in carbon nanostructure-based composites bymeans of an external voltage supplied to the material. DC bias voltages are imparted through a metal wire-grid. The magnitude of the reflection coefficient is measured upon oblique plane-wave incidence. Increasing the bias from 13 to 700 V results in a lowering of ∼20 dB, and a “blueshift” of ∼600 MHz of the material absorption resonance. Observed phenomena are ascribed to a change of the dielectric response of the carbon material. Inherently, the physical role of tunneling between nanofillers (carbon nanotubes) is discussed. Achievements aim at the realization of a tunable absorber. There are similar studies in literature that focus on tunable metamaterials operating at either optical or THz wavelengths.

Tunable nanostructured composite with built-in metallic wire-grid electrode / Micheli, Davide; Pastore, Roberto; Gabriele, Gradoni; Marchetti, Mario. - In: AIP ADVANCES. - ISSN 2158-3226. - Volume 3:Number 11(2013), pp. -----. [10.1063/1.4837916]

Tunable nanostructured composite with built-in metallic wire-grid electrode

MICHELI, DAVIDE;PASTORE, Roberto;MARCHETTI, Mario
2013

Abstract

In this paper, the authors report an experimental demonstration of microwave reflection tuning in carbon nanostructure-based composites bymeans of an external voltage supplied to the material. DC bias voltages are imparted through a metal wire-grid. The magnitude of the reflection coefficient is measured upon oblique plane-wave incidence. Increasing the bias from 13 to 700 V results in a lowering of ∼20 dB, and a “blueshift” of ∼600 MHz of the material absorption resonance. Observed phenomena are ascribed to a change of the dielectric response of the carbon material. Inherently, the physical role of tunneling between nanofillers (carbon nanotubes) is discussed. Achievements aim at the realization of a tunable absorber. There are similar studies in literature that focus on tunable metamaterials operating at either optical or THz wavelengths.
2013
01 Pubblicazione su rivista::01a Articolo in rivista
Tunable nanostructured composite with built-in metallic wire-grid electrode / Micheli, Davide; Pastore, Roberto; Gabriele, Gradoni; Marchetti, Mario. - In: AIP ADVANCES. - ISSN 2158-3226. - Volume 3:Number 11(2013), pp. -----. [10.1063/1.4837916]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/533468
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