Graphene-enabled electrically switchable radar-absorbing surfaces

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 real...

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Bibliographic Details
Published in:Nature communications 2015-03, Vol.6 (1), p.6628-6628, Article 6628
Main Authors: Balci, Osman, Polat, Emre O., Kakenov, Nurbek, Kocabas, Coskun
Format: Article
Language:English
Subjects:
639/301/357/918/1052
639/624/1075/1081
639/624/399/918
639/766/25
Humanities and Social Sciences
multidisciplinary
Science
Science (multidisciplinary)
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Summary: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
ISSN:2041-1723
2041-1723
DOI:10.1038/ncomms7628