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Microwave absorption and radiation from large-area multilayer CVD graphene


Type

Article

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Authors

Wu, B 
Tuncer, HM 
Katsounaros, A 
Wu, W 
Cole, MT 

Abstract

Here we experimentally study the microwave absorption and near-field radiation behaviour of monolayer and few-layer, large-area CVD graphene in the C and X bands. Artificial stacking of CVD graphene reduces the sheet resistance, as verified by non-contact microwave cavity measurements and four-probe DC resistivity. The proposed multilayer stacked graphene exhibits increased absorption determined by the total sheet resistance. The underlying mechanism could enable us to apply nanoscale graphene sheets as optically transparent radar absorbers. Near-field radiation measurements show that our present few-layer graphene patches with sheet resistance more than 600 /sq exhibit no distinctive microwave resonance and radiate less electromagnetic power with increasing layers; however, our theoretical prediction suggests that for samples to be significant as microwave antennas, doped multilayer graphene with sheet resistance less than 10 /sq is required.

Description

Keywords

51 Physical Sciences, 40 Engineering, 4018 Nanotechnology, 5104 Condensed Matter Physics

Journal Title

Carbon

Conference Name

Journal ISSN

0008-6223
1873-3891

Volume Title

Publisher

Elsevier
Sponsorship
Engineering and Physical Sciences Research Council (EP/K01711X/1)
This work was funded by the Graphene Research Centre, University of Cambridge, and the Engineering and Physical Sciences Research Council (EPSRC), UK under a Program Grant (EP/K01711X/1). M.T.C thanks the Winston Churchill Trust and the International Young Scientist Research Fellowship, National Natural Science Foundation of China, for generous financial support. B.W. acknowledges the fund support from the China Scholarship Council and National Natural Science Foundation of China No. 61271017.