Graphene-enabled electrically switchable radar-absorbing surfaces

Osman Balci, Emre O. Polat, Nurbek Kakenov and Coskun Kocabas ()
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Osman Balci: Bilkent University
Emre O. Polat: Bilkent University
Nurbek Kakenov: Bilkent University
Coskun Kocabas: Bilkent University

Nature Communications, 2015, vol. 6, issue 1, 1-10

Abstract: Abstract Radar-absorbing materials are used in stealth technologies for concealment of an object from radar detection. Resistive and/or magnetic composite materials are used to reduce the backscattered microwave signals. Inability to control electrical properties of these materials, however, hinders the realization of active camouflage systems. Here, using large-area graphene electrodes, we demonstrate active surfaces that enable electrical control of reflection, transmission and absorption of microwaves. Instead of tuning bulk material property, our strategy relies on electrostatic tuning of the charge density on an atomically thin electrode, which operates as a tunable metal in microwave frequencies. Notably, we report large-area adaptive radar-absorbing surfaces with tunable reflection suppression ratio up to 50 dB with operation voltages

Date: 2015
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DOI: 10.1038/ncomms7628

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